KJE RV Trailer Jack Blocks 4-Pack 6" High Leveling Blocks — 11.5"x11.5", Stackable, 10,000 lb Capacity Each

KJE 4PCS RV trailer jack blocks are a durable, stackable 6" leveling solution built from industrial-grade polypropylene to support heavy trailers and stabilize jacks safely.

These KJE leveling blocks come as a set of four 11.5" x 11.5" x 6" units designed to sit under jack feet, tongue jacks, scissor jacks or stabilizers and provide a stable, high-capacity base on uneven ground. Each block carries up to 10,000 pounds, so the complete set supports up to 40,000 pounds. Built with anti-UV additives, drainage channels, interlocking grooves and recessed post holes, they resist sun, dirt and moisture while locking your jack into place. The lightweight 3.9 lb blocks pack into the included storage bag for easy transport and tool-free setup.

How do these blocks improve stability when setting up camp?

Placed under a jack foot or stabilizer, the KJE blocks spread load across a broad, reinforced surface to prevent sinking and rocking. The textured top and recessed holes keep the jack peg centered so movement, tilt and pop-outs are minimized on soft or uneven terrain.

• Wide 11.5" x 11.5" footprint resists sinking on sand, gravel or grass
• Anti-slip textured surface reduces lateral sliding
• Recessed post holes lock jacks and stabilizers into position
• Thickened sides and reinforced bottom prevent deformation

Can I stack the blocks to gain extra height or adjust leveling?

Yes — KJE blocks are engineered for secure stacking. Grooved tops and interlocking edges align blocks and prevent shifting, letting you add inches of lift safely for leveling or clearance without compromising load capacity or stability.

• Interlocking grooves for reliable stacked alignment
• Stackable design keeps load centered and balanced
• Each block rated 10,000 lb; stacking multiples increases clearance
• Useful for incremental leveling or raising jacks in tight spaces

Are these blocks weatherproof and durable enough for long-term outdoor use?

KJE leveling blocks are molded from industrial-grade polypropylene with anti-UV additives, so they resist sun degradation, oil and road grime. Built-in drainage holes and a robust surface structure reduce water accumulation and extend service life in wet or harsh conditions.

• Anti-UV PP resists cracking and discoloration from sunlight
• Integrated drainage holes prevent standing water and mud buildup
• Chemical-resistant surface stands up to oil and grime
• Robust construction handles temperature extremes without warping

What jacks and trailers are these blocks compatible with?

These blocks are designed to pair with most trailer and RV jacks — scissor, tongue, wheel, round, square or stabilizer posts. Their recessed holes and wide base also make them versatile as motorcycle stands, portable seats or temporary steps when camping.

• Fits scissor jacks, tongue jacks, wheel jacks and stabilizers
• Works with 5th wheels, travel trailers, boats and utility trailers
• Multiuse as a seat, step or small stand when not under a jack
• Tool-free setup: lightweight and easy to position by hand

Who is this for? The KJE 4PCS RV trailer jack block set is ideal for RV owners, tow vehicle operators and weekend campers who need a reliable, portable solution to stabilize jacks and level trailers on unpredictable ground. It’s also useful for boat owners, small trailer users and anyone wanting a compact, high-capacity support block that resists sun and weather and packs away easily in a carry bag.