Keep your trailer or RV in place on your Stackers leveling blocks with this wheel chock. Chock measures 6" long x 7-1/2" wide x 5" tall. Handle on chock interlocks with blocks. ... The Stackers chock can then be attached to the leveling blocks to help stop your trailer or RV from rolling off of the Stackers. Attaching the chock to the blocks is easy.
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