Best Slide Toppers for 2026 Jayco Seismic 359
Updated 05/21/2026 | Published 05/19/2026
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Question:
2026 Jayco Seismic 359 Two slide outs - 138.5inch and 68inch measured from the flange edges Am I correct with the 144inch slide topper, e37QV, and the 78inch slide topper, e69QV?
asked by: Carl
Expert Reply:
Hey Carl, thanks for the dimensions of your two slide outs! Based on that the correct slide toppers part # e37QV and # e69QV are correct for you. I actually just came from a training where we were checking out these slide toppers and they're really nice! The hemmed edges on both sides instead of one side being cut material will definitely make this last longer! This comes with awning rails too so you'll have everything you'll need to install it.
Product Page this Question was Asked From
etrailer RV Slide-Out Topper - 144" Wide - 4-Layer Vinyl - Black
- RV Awning
- Slide-Out Awnings
- Extends 4 Feet
- 12 Feet Wide
- 134 Inch Wide
- 135 Inch Wide
- 136 Inch Wide
- 137 Inch Wide
- 138 Inch Wide
- 139 Inch Wide
- Black
- etrailer
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on RV Awning
Carl
5/21/2026
Thanks, Jameson, I'll see about contacting one of your installers.