Trailer Jack Block 6000 lbs Capacity RV Leveling Blocks - 4-Pack

Our review of these trailer jack blocks finds them best for RV owners and campers who need a simple, durable way to stabilize and level trailers on uneven ground. The four-pack offers an easy stacking system and a large footprint that noticeably reduces wobble under jack feet and stabilizers. Built from polypropylene with an integrated drainage hole, these blocks balance usability with weather resistance, making them a practical choice for weekend trips and longer stays where quick setup and solid support matter.

Key Features

• 6000 lbs capacity: Each block supports heavy loads so the set handles typical travel trailers and fifth wheels with confidence.
• Stackable design: Blocks stack quickly to adjust height, allowing fast leveling without tools or complex setup.
• Durable polypropylene: The T30 material resists UV, water, oil, tar, and soil, helping the blocks survive outdoor exposure.
• Integrated drainage hole: Drainage reduces trapped moisture and helps prevent rust on metal jack bases resting on the blocks.
• Wide footprint: The increased surface area spreads weight for improved stability on soft or uneven ground.
• Versatile fit: The shape and size accommodate tongue jacks, posts, feet, and stabilizers on a variety of RVs and campers.

Who It's For

This set is aimed at owners of travel trailers, campers, and motorhomes who need a no-fuss way to level and stabilize while parking on campsites, gravel pads, or uneven driveways. It suits people who value quick setup, portability, and a durable plastic block that resists common environmental challenges.

Those needing heavy industrial supports or metal jack adaptors for extremely high mileage commercial use should look elsewhere; likewise, buyers expecting perfectly indestructible performance under constant heavy impact may prefer a metal solution. For typical recreational use these blocks are an effective, affordable option.

Pros & Cons

Pros

• High rated capacity provides confidence under typical trailer and fifth wheel loads.
• Stackable, lightweight design makes setup and height adjustment fast and easy.
• Material resists UV, water, oil, and soil for reliable outdoor use.
• Large footprint improves stability and reduces wobble at the jack or stabilizer contact point.

Cons

• Some users report cracking on the bottom under extreme or uneven stress, so careful placement and even stacking help longevity.
• The blocks are plastic, so those preferring all-metal supports may find them less robust for constant heavy-duty use.

Specifications

Model Number	CXFC02
Quantity	4 pcs
Support Height	8 in
Max Capacity	6000 lbs
Material	Polypropylene T30
Product Dimensions	9.65 x 9.65 x 8.03 in
Net Weight	20.39 lbs / 9.25 kg

Our Verdict

These trailer jack blocks deliver good value for recreational RV owners who want an easy, stackable, weather-resistant leveling solution. They pair high load capacity with a stable footprint and fast setup, making them a smart choice for campsite leveling and stabilizing. Users should stack and position them carefully to avoid stress points that can lead to cracking, but for most campers they represent a practical, affordable stabilizer option.

Frequently Asked Questions

Can these blocks be stacked to increase height?
Yes, the blocks are designed to be stacked to achieve additional height and fine tune leveling without tools.

Will they hold up outdoors in sun and rain?
The polypropylene T30 construction resists UV, water, oil, and tar, making them suitable for outdoor exposure.

What weight can each block support?
Each block is rated for up to 6000 lbs of capacity as specified by the manufacturer.