Fast & Easy Trailer Stabilization Using the Trailer Jack block under your jack(s) means your jack doesn’t need to extend down as far, saving on wear and tear over time. And because the jack doesn’t need to extend fully, there’s less stress on it from movement - it’s a win-win for RVs and Trailers. • Built-in magnets instantly attach to the jack, so there is no need to double-check and adjust each jack block. • A 2-1/2” recessed post hole works great with post jacks • Stackable for extra height (no more than 2) Weight Rating & Specs • Each 8" Trailer Jack Block is rated to up to 8,000 lbs or 1,500 lbs when double stacked • Each 4" Trailer Jack Block is rated to up to 30,000 lbs or 20,000 lbs when double-stacked • 12” diameter base, 10“ diameter top • Top of the jack block includes a 9-1/8” diameter recessed pad and a 2-1/2” recessed post hole for post jacks • Weighs 5.3 lbs • Made in the USA • Covered under lifetime warranty
