This 8-piece RV leveling kit includes 6 cylindrical trailer jack blocks and 2 square leveling pads for added stability on uneven ground. Each block supports up to 2,000 lbs and provides up to 8" of height for leveling and support. The universal design works with round and square jack legs, trailer support wheels, and insertable legs. Made from durable PP material, the blocks are designed to grip surfaces like grass, sand, gravel, and snow. Ideal for travel trailers, fifth wheels, and Class A and C RVs.