ROBLOCK 6" Trailer Jack Block — 6in Stackable RV Stabilizer Block, 40,000 lb Capacity with Carry Bag

Whether you're setting up camp on gravel, soft soil, or a sloped driveway, the ROBLOCK 6" trailer jack block provides a reliable base for jacks and stabilizers. Made from high-performance polymer with anti-UV additives, each block resists oil, grime and weathering so it stays functional season after season. The stackable design gives adjustable height while the included carry bag and built-in handle keep storage and transport simple.

How does this block improve stability for my RV or trailer?

The ROBLOCK jack block increases the contact area between the jack foot and the ground, distributing load and minimizing sinking, rocking and lateral movement. It works with a wide range of jack types so you can feel steadier inside your camper and reduce wear on jack mechanisms.

• G.V.W. rating: supports up to 40,000 lbs per block
• Large 11.5" x 11.5" footprint for better weight distribution
• Works with tongue jacks, wheel jacks, 5th wheel hydraulic feet and scissor stabilizers

How do I adjust height and stack these blocks safely?

Each block is designed to interlock and stack securely so you can add or remove levels to reach the height you need. Stacking increases height while maintaining stability, but always ensure blocks sit flat on level ground and follow manufacturer load limits.

• Approximately 6" tall per block for predictable increments
• Stackable profile prevents slipping when aligned correctly
• Use a maximum number of blocks that keeps loads within 40,000 lbs rating

Will it fit my jack type and how easy is it to carry or store?

These blocks are made to accept nearly any jack foot shape — round, square, scissor-style or the common 9" round 5th wheel hydraulic jack foot. A built-in side hole and included rope make lifting or attaching easier, and the supplied storage bag keeps blocks compact and protected when not in use.

• Compatible with most tongue jacks, post feet, and scissor stabilizers
• Side hole and rope for convenient carrying
• Storage bag included for organized packing and space saving

What materials and durability features should I expect?

The blocks are molded from a high-performance polymer formulated with anti-UV aging additives, which resists cracking, dirt adhesion and oil exposure. That composition preserves structural strength and appearance even after repeated outdoor use.

• High-performance polymer construction for long-term durability
• Anti-UV additives to reduce sun-related degradation
• Easy-to-clean surface that resists grime and oil buildup

Who is this for: The ROBLOCK 6" trailer jack block is ideal for RV and trailer owners who want a dependable, portable solution for stabilizing jacks and reducing sway. It’s suited for owners of travel trailers, fifth-wheels, campers and towable RVs who frequently park on variable surfaces and need adjustable height, rugged materials, and convenient storage in a single pack.