4 PCS 6in H Trailer Jack Block - RV Stabilizer Blocks for Tongue Jacks

Our review of these 4 PCS 6in H Trailer Jack Blocks finds them useful for owners who need a simple, heavy duty way to stop jack foot sinking and reduce sway when their trailer is parked. The set is aimed at RV and camper owners who use tongue jacks, wheel jacks, 5th wheel hydraulic feet or scissor stabilizers and want a stackable, transportable solution. The single biggest reason to buy is the combination of a high weight rating per block and a stackable design, which lets users quickly adjust height and stabilize a trailer on uneven ground.

Key Features

• Wide compatibility: Each block supports nearly any tongue jack foot, wheel jack or scissor stabilizer so it fits most campers and travel trailers.
• High load rating: The polymer construction is rated at 25000 lbs per block, providing solid support under heavy loads.
• Stackable height adjustment: The blocks stack to allow quick, incremental height changes for leveling on uneven surfaces.
• Durable materials: Made from a high-performance polymer with anti-UV additives to resist grime and aging during outdoor use.
• Portable storage: Side holes and included storage bags make the set convenient to carry and save space when stored.
• Size for stability: At about 6.3 in tall with a broad footprint they create a stable contact area for jack feet and posts.

Who It's For

This product is best for RV owners, travel trailer users and anyone who needs to stabilize a parked trailer quickly without permanent hardware. It is particularly helpful for people who camp on soft ground or uneven sites where a jack foot would otherwise sink or shift.

Those who should look elsewhere include users who need integrated leveling systems with built-in sensors or motorized actuators, or buyers who require metal plates for specialized industrial jacks; this set is a polymer, manually stacked solution intended for camper and trailer use.

Pros & Cons

Pros

• High per-block rating gives confidence under heavy tongue or jack loads.
• Stackable design makes height adjustments fast and adaptable to varied terrain.
• Included storage bags and side holes improve portability and organization.
• Anti-UV additives help resist wear from sun exposure and grime.

Cons

• The blocks are polymer and may not suit buyers seeking metal jack pads or factory integrated systems.
• Precise dimensions mean you may need multiple stacks to reach very large height differences.

Specifications

Our Verdict

These trailer jack blocks are a practical value for most RV and camper owners who want a portable, heavy duty way to eliminate sway and sinking at the jack foot. The stackable, UV-resistant polymer construction and included storage bags make them an easy upgrade for leveling and stabilizing without complicated hardware, especially when weight rating and portability matter.

Frequently Asked Questions

Are these blocks compatible with 5th wheel jack feet?
Yes, they support round 5th wheel hydraulic jack feet as well as tongue and wheel jacks.

How tall is each block and can you stack them?
Each block is about 6.3 in tall and they are designed to stack to achieve the desired height.

Do they resist sun and grime?
The blocks use a high-performance polymer with anti-UV additives to resist dirt, grime and aging from sun exposure.