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Ultra-Fab Leveling Blocks for Trailers and RVs - 8-1/4" Wide x 8-1/4" Long - Qty 8

Ultra-Fab Leveling Blocks for Trailers and RVs - 8-1/4" Wide x 8-1/4" Long - Qty 8

Item # UF48-979052
Our Price: $58.32
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RV Leveling Blocks
Shipping Weight: 7 lbs
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Interlocking blocks stack to different heights and can be positioned beneath jacks, stabilizers or RV wheels to add just enough lift to level your rig. Great Prices for the best rv leveling blocks from Ultra-Fab Products. Ultra-Fab Leveling Blocks for Trailers and RVs - 8-1/4" Wide x 8-1/4" Long - Qty 8 part number UF48-979052 can be ordered online at or call 1-800-940-8924 for expert service.
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Ultra-Fab Products RV Leveling Blocks - UF48-979052

  • Stackable Blocks
  • 8-1/4L x 8-1/4W Inch
  • Blue
  • 8 Blocks
  • Ultra-Fab Products

Interlocking blocks stack to different heights and can be positioned beneath jacks, stabilizers or RV wheels to add just enough lift to level your rig.


  • Stackable blocks provide extra lift to level your trailer or motor home
    • Position beneath jacks, stabilizers or trailer wheels
  • Interlocking design guarantees no shifting or collapsing once stacked
    • Stack straight up for extra height
    • Stagger blocks to create a ramp so you can easily drive up
  • Durable plastic construction
  • Storage case with integrated carrying handle included


  • Quantity: 8 blocks
  • Individual block dimensions: 8-1/4" wide x 8-1/4" long
  • Weight capacity: 30,000 lbs
  • 3-Year warranty

Note: The manufacturer does not recommend stacking more than 5 blocks high

48-979052 UltraFab Ultra Leveling Blocks - 8 Pack

Video of Ultra-Fab Leveling Blocks for Trailers and RVs - 8-1/4" Wide x 8-1/4" Long - Qty 8

Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.

Video Transcript for Ultra-Fab Trailers and RV Leveling Blocks Review

What's up everybody. It's AJ with Today, we're going to check out the Ultra-Fab, ultra levelers. These are leveling blocks to get your rig nice and level on uneven ground. So when you get to the campsite you see it's not exactly level, you don't want to be in your camper or RV that's like sideways walking around it all day. These are going to go underneath your jacks and under your tire to level it out.

Let's check them out.We've all seen this set up at the campsite, people using woodblocks to help level out their RV or camper, it's not an option. You really shouldn't do that, the wood's going to collect moisture or rot over time and fail on you. That's why we're using these leveling blocks today, they have a heavy duty plastic.I just want to show you, I'm trying to bend it. That's how thick.. It is.

If it was a flimsy plastic, you'd see me bend it or bow it a little bit. It's not happening. I kind of drop it on the ground a couple of times. I know you can't feel the weight but you might be able to hear that it's not just a high pitch, plastic noise and bouncing around like that. Super heavy duty, it's holding up to that.

So that's going to hold up to underneath your RV or camper.These leveling blocks are eight and a quarter by eight and a quarter. And also they're seven, eight tall up to the bottom of this top peg here, and then a half inch from there. And the reason why I separated that measurement, because when you go to stack them like this and like this, they nest inside of each other, you kind of just see the pack here at the top.They work in a variety of different ways and that's because of design much like blocks. You can see that these holes plug right into here and you've got your shape. So when you're pulling up on there, when you're tired, it's not going to kick one out from underneath each other, they're blocked together.

I can't pull them apart here, so you don't have to worry about them sliding and you can see, we use it over here on our camper today. They're nice and in place, I'll pull on it. It's not going anywhere and it gets you that height you need, but they also versatile so that you can switch it up. You never know the campgrounds aren't always going to be the same, so it's good to be able to have those options when you're on the road or you stack them five high.Now these levelers come in four different packs. You can get a four pack, an eight pack or a 10 pack. Each one comes with a carrying case where you just stack them back up in here and zip it up and then you can just easily throw in a compartment and it's out of the way, but it's with you at all times when you need it. Whichever one you go with though, they are all raised the same 30,000 pounds. Just if you have the eight pack or the 10 pack, don't stack them any higher than five.We've arrived at our campsite and you can already see that the ground is uneven. If you look at the level, you can see just how uneven our ground is. What we're going to want to do with our camper today is level it out and that's what when we just go from side to side, to try and figure that out.So we're going to take one block like this, put it underneath the level. You can see how that evens it out. We're going to do that on a bigger scale with our camper today, by putting our leveling blocks like this and kind of the pyramid stack, and we're going to put it behind our tire, then we're going to back up onto them. And that should get it closer to level and this might take a couple tries to figure out how much you need or how many of the blocks you need stacked up but we're going to start here and see how it works.Looking at our trailer, we actually added a magnetic level, we carry, to see how uneven it actually is. Alright, so now we're going to go ahead and I'm going to have Joe back up the camper onto the blocks and we'll watch it in action.Stop! You can see we're right on top of those blocks now, they didn't screech on the ground or move at all, they went right up on there and it's holding it pretty good. With our camper pulled up on the blocks, you can see it really did level it all out from side to side and front to back. So now what I'm going to do is lower the jack and detach our camper from our truck. We will have lowered the jack and also make sure you've already wheel chocked the wheels. I did that right before I started doing this.With my truck pulled forward now, I'm going to go ahead and lower the camera back down by the jack and try and get this level more here in the middle.Looks good there. We're going to take two of our blocks, put them underneath the stabilizer jack, that'll just help even things out. With our stabilizer jack making contact with the block, we're just going to go ahead around our camper and do the same thing for each stabilizer jack.Now we're back in their RV to check the level one more time, I'm going to do side to side and then front to back. So we'll just set this down, looks alright, there on side to side, let's try front to back. Awesome! We are completely level, it just goes to show you how easy it is to set up the Ultra-Fab bricks that go together, come apart very easily. It only adds a couple extra steps to your process when you get to a campsite anyway, but now the leveling it out is going to be such a big deal. You're armed with these. You're good to go. I think that does it for our look at the Ultra-Fabs. Hope this helped.

Customer Reviews

Ultra-Fab Leveling Blocks for Trailers and RVs - 8-1/4" Wide x 8-1/4" Long - Qty 8 - UF48-979052

Average Customer Rating:  4.7 out of 5 stars   (227 Customer Reviews)

Interlocking blocks stack to different heights and can be positioned beneath jacks, stabilizers or RV wheels to add just enough lift to level your rig.


These are so nice - the carrying case makes transport easy and neat! It doesn’t take long to figure out how many you need to level either.



Fantastic! Still going strong.


Using these for my main jack and stabilizer jacks (not as leveling blocks). They're serving that purpose super well, as my driveway is uneven and this helps get the height I need. Pricy, but I expect them to last a very long time.


I am going 3 stars here only because on my first use, one level slid out from the tire and a few pieces cracked off the bottom. Perhaps user error but it did happen.



Meant for leveling jacks not tires, especially not tires on a gravel surface. All but three cracked and I ultimately gave the others away. I replace these with Anderson Camper wheel chock and leveler.


Should work perfectly.


Easy to use and place appropriately. Only problem was in one campsite the ground was especially unlevel, and when we drove up on the blocks the tire broke off a corner on one of the blocks.


Haven't used them; I'll be camping soon, and I'll sure give them a try. got to be better than the two long boards I've been usong.

Randy J.


They make it much easer to level my camper.


These are very sturdy and will be very helpful.


I have been shopping with etrailer for a number of years. The products they use are top notch. Customer service is friendly and knowledgeable. Delivery is on time


I have a set of these already and love them. I bought a second (this set) for more spacing for landing feet. Not cheaper than wood blocks, but definitely lighter and more adjustable. Worth the purchase!


Haven't used them yet but they arrived undamaged and very quickly.
We will no doubt be utilizing them over Labor Day weekend and other fall campouts this season.. Will be ordering from etrailer again !!


Like that they came with a storage bag. Seem really sturdy, will be trying out next weekend


Works great


Nice unit, the stack up well, store easy, and work nicely with our camper.


Fast delivery and great product.

Michelle T.


We are still very happy with all products purchased. They have held up very well and still look like new after a year of use.


I love ordering from never any problems ans shipping is always very fast. Will be ordering more for next camping season.


This device has performed very well and has done everything I have asked it to do.


Very handy. Easy to use and store. Inter
works perfect.


Great product. Need to try out. Great company to work with, appreciate all the follow ups.


These things are great. I have 2 sets n ow.


Haven't had a chance to use them yet, but appears to be well made and like the case. They were received promptly. Great transaction, thank you.


Great product for those with campers!


Excellent product. Shipped as advertise d.


Just as advertised. Good business people


I need to buy another set for our Campe r.


Big, sturdy building blocks for a big t oy!

Show More Reviews

See what our Experts say about this Ultra-Fab Products RV Leveling Blocks

  • What are the Dimensions of the Ultra-Fab Leveling Blocks UF48-979052
    Each plate that comes with the Ultra Fab leveling blocks is 1-3/8 inches tall and measures 8-1/4 by 8-1/4 inch in width and length. I attached a review video for this leveling kit for you to check out as well.
    view full answer...
  • Can Scissor Jacks be Used in Place of Blocks on a Destination Trailer
    You can use the Ultra-Fab Ultra Scissor Jacks, # UF48-979002, in place of blocks. In fact, many newer destination trailers use multiple scissor jacks. Keep in mind, these are stabilization jacks. They are not meant to raise the trailer, just to stabilize the movement. Blocks are commonly used because they are not only inexpensive and readily available, but they also provide more ground contact and zero movement over time. If you will be parking this trailer on grass or dirt for extended...
    view full answer...
  • Dimensions of Ultra-Fab Leveling Blocks
    The Ultra-Fab Leveling Blocks individually measure 8-1/4" wide x 8-1/4" long each; they are available in different quantities: - Quantity of 4: Ultra-Fab Leveling Blocks # UF48-979050 - Quantity of 8: Ultra-Fab Leveling Blocks # UF48-979052 - Quantity of 10: Ultra-Fab Leveling Blocks # UF48-979051 I have added a link to a video review of these leveling blocks for you to take a look at.
    view full answer...
  • Is Robofoot of Atwood Jacks Removable
    The Robofoot of the Atwood Powered Jack part # AT81069 that you referenced can be removed, but it can not be replaced with a standard foot. If you needed something to like a foot to spread the weight of the trailer out you could use the levelers like part # UF48-979052 with the foot off of the jack.
    view full answer...
  • Troubleshooting Lippert High-Speed Power Stabilizer Jack LC298707 Not Leveling Trailer
    I would be happy to help! The Lippert High-Speed Power Stabilizer Jack - Black Waterproof Switch Kit - 30" Lift # LC298707 you mentioned is not designed for leveling your 26' Grand Design Travel Trailer, and is only designed to be used to stabilize the trailer. You will first need to level the trailer using block similar to the Ultra-Fab Leveling Blocks for Trailers and RVs - 8-1/4" Wide x 8-1/4" Long - Qty 8 # UF48-979052 to get the trailer level side to side, and then use the tongue...
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  • Comparing Ultra Fab and Camco RV Leveling Blocks
    I would say that quality wise the Camco kit part # CAM44521 is the same as the Ultra Fab kit part # UF48-979052. Based on price alone I would go with the Camco if it were me. Unless you really like the color blue... You can also use them on your trailer's jack as well. I attached a review video for you to check out too.
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  • Are There Leveling Blocks Wider Than 8-1/4 Inches?
    Each of the leveling blocks we carry have a width between 8-1/4 inches, such as the Ultra-Fab # UF48-979052 you mentioned, and 8-1/2 inches, such as the Stackers # A10-0918. The Stackers have a 40,000 lbs gross vehicle weight capacity and can be used for scissor jacks, hydraulic jacks, fifth wheel jacks, and stabilizer jacks.
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  • Operation and Sturdiness of Stromberg Carlson Camper Jack # JB-20 when Fully Extended
    I was able to go out to our warehouse and test out the strudiness of the Stromberg Camper Jack # JB-20, and check out the handle for you. I found that the handle does rotate down so that it won't stick out after you have set the height of the jack. I also found that they are very sturdy once the handle and nut are tightened to the base, even at the fully extended height. I have to tell you though, after spending the time to fully extend it and rotate the nut to the bottom, I had some...
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  • Recommended Slide Out Stabilizer For Keystone Sprinter 29 Foot RV
    For your slide out on your Keystone Sprinter, I recommend the Jack-in-a-Box Camper Slide-Out Support Set - 31" to 45" Tall - 10,000 lbs - Qty 2, # JB-30, made by Stromberg Carlson. With a support jack, more capacity is a good thing when used properly, so this jack support much more weight than the Ultra-Fab Slide-Out Supports for Motor Homes - 26" to 47" - Qty 2, # UF19-960003 rated for 700 lbs each or 1400 lbs combined. With a weight difference of about 2-1/2 lbs each, I recommend going...
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  • How To Manual Override Lippert High-Speed Stabilizer Jack LC298707 If Power Goes Out
    Should you lose power in your 2021 Rockwood Mini Lite you can still manually override the Lippert High-Speed Power Stabilizing Jack # LC298707 by using the Replacement Manual Crank Handle for Lippert 5th Wheel RV Landing Gear # LC119226 which is sold separately. You will need to insert the handle over the coupler and pin on the end of the stabilizer which is located on the opposite side of the motor as shown in the included picture. This stabilizer jack is not designed to level you trailer,...
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  • Recommended Slide-Out Stabilizer Support for a Large 5th Wheel Slide-Out
    The Ultra-Fab slide out supports # UF19-960003 will have a combined weight capacity of 1,400 pounds and an adjustable height between 26-47 inches. I like the quick-release handle for extremely easy height adjustment. You simply press the button to release the inner tube and adjust as necessary. I think these will be just fine for your large slide-out. The Ultra-Fab slide-out supports # UF19-960001 or # UF19-960003 both have a 1400 pound weight capacity per jack. The 003 can adjust between...
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Do you have a question about this RV Leveling Block?

Info for this part was:

Employee Andrew K
Installed by:
Andrew K
Employee Lindsey S
Written by:
Lindsey S
Employee Jameson C
Expert Research:
Jameson C
Employee Chris R
Video Edited:
Chris R
Employee Wilson B
Updated by:
Wilson B
Employee Hannah L
Updated by:
Hannah L
Employee Halie H
Updated by:
Halie H
Employee Matthew E
Updated by:
Matthew E
Employee Eric H
Updated by:
Eric H
Employee Aidan B
Video by:
Aidan B

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