6inH Trailer Jack Block 2 PCS RV Camper Stabilizer Blocks - Heavy Duty

In this review the 6inH Trailer Jack Block pair is evaluated for RV and trailer owners who need a simple, durable solution to reduce sway and movement when parked. The bottom line: these stackable blocks offer a heavy duty, universal base that supports nearly any tongue jack foot or stabilizer and makes leveling faster and more secure. The review focuses on real-world fit, construction, and portability so readers can decide if these blocks suit their camper, fifth wheel or travel trailer setup.

Key Features

• All-in-one compatibility: Works with tongue jack feet, wheel jacks, 9 round 5th wheel hydraulic jack feet and scissor stabilizers so you only need one type of block for multiple uses.
• High load rating: Each block is rated at 25,000 lbs so they provide a reassuringly strong base under a variety of trailer jack types.
• Stackable adjustable height: The blocks stack to change height quickly, making it easier to level on uneven ground without extra tools.
• Durable polymer construction: Made from a high-performance polymer with anti-UV additives to resist dirt, grime and oil during outdoor storage and use.
• Portable storage: Side holes and an included storage bag make the blocks easy to carry and save space in your gear compartment.

Who It's For

These jack blocks are aimed at RV owners, travel trailer and fifth wheel users who want a universal, heavy duty base that reduces sway and provides a firm footing for jacks and stabilizers. They are especially useful for those who frequently level on gravel, dirt or soft surfaces and want a lightweight, weather-resistant solution that stacks for fine height adjustments.

They are less appropriate for users who need precision metal leveling systems or integrated leveling jacks; these are supplemental blocks intended to support and stabilize existing jack feet rather than replace an automated leveling system.

Pros & Cons

Pros

• Universal fit for many jack feet and stabilizers reduces the need for multiple block types.
• 25,000 lb rating per block provides strong, dependable support under heavy trailers.
• Stackable design offers quick adjustable height for better leveling on uneven ground.
• Durable, UV-resistant polymer resists oil and grime for longer service life outdoors.

Cons

• Blocks are relatively large and may take up cargo space even with the provided bag.
• They supplement but do not replace precision leveling systems for users who need automated control.

Specifications

Product type	Trailer jack stabilizer block (pair)
Height	6.3 in each
Length	11.2 in
Width	8.9 in
Load rating	25,000 lbs per block
Material	High-performance polymer with anti-UV additives
Includes	2 blocks and a storage bag

Our Verdict

For most RV and trailer owners who need a dependable, universal support under jack feet and stabilizers, these trailer jack blocks are a practical, cost-effective choice. Their high load rating, stackable adjustability and UV-resistant construction make them good value for seasonal and frequent campers who want to reduce sway and improve parked stability.

Frequently Asked Questions

Will these blocks work with a 5th wheel hydraulic jack foot?
Yes, they are designed to accept round 5th wheel hydraulic jack feet and provide a stable base.

How much weight can each block support?
Each block is rated to support up to 25,000 lbs according to the manufacturer specifications.

Are they easy to store in a trailer?
Yes, the side holes and included storage bag make them convenient to carry and pack away when not in use.