TOWKING 4.3" H 12000lbs Trailer Jack Block

The TOWKING 4.3" H 12000lbs Trailer Jack Block is a heavy-duty, universal leveling block system built to stabilize trailers and campers quickly and reliably.

Designed for owners of trailers, campers, and RVs, this TOWKING leveling block combines a high-load polypropylene body, an anti-tilt cone base and integrated travel accessories to make setup fast and secure. UV-protected plastic resists weathering while drain holes and an ergonomic grip keep each block practical for frequent use. The kit's 10" platform and 2.5" center hole accept most jack feet so you can use one solution for tongue jacks, scissor jacks, wheel jacks and even 5th-wheel applications.

How does this jack block support heavy trailers without sinking?

The TOWKING block uses an anti-tilt cone base plus eight reinforcement ribs to distribute weight and resist lateral movement on soft or uneven ground. The wider 10" platform increases contact area so pressure is spread across a larger footprint, reducing the chance of sinking into mud or sand.

• 12,000 lb rated heavy-duty UV-stabilized polypropylene construction
• Anti-tilt cone base and 8 load-bearing ribs for stability
• 10" platform increases ground contact and reduces ground pressure
• Drain holes prevent water pooling and add durability

Will these blocks fit my trailer jack foot?

Yes — the TOWKING blocks are built to be universally compatible. A 2.5" center hole and broad 10" top platform accept most jack foot sizes and shapes, making them suitable for tongue jacks, scissor jacks, wheel jacks and many 5th-wheel landing gear feet.

• 2.5" center hole fits standard and oversized jack feet
• Large landing surface for different jack designs and feet
• Works with tongue jacks, scissor jacks, wheel jacks and 5th wheel systems
• Stackable design for added height and fine leveling

How fast and easy is setup when leveling or stabilizing?

Setup takes seconds thanks to the ergonomic grip, lightweight engineering and travel-ready carry bag. Place the block under the jack foot, align the cone base, and crank the jack until secure — no tools required. The included quick-strap and 600D storage bag keep the system organized for on-road use.

• Ergonomic grip for one-handed positioning
• Quick-strap secures blocks for storage and transport
• 600D fabric bag holds the set and resists wear on the road
• Drain holes and stackable form for rapid adjustments

How does the TOWKING block perform in rough or wet conditions?

The UV-shielded polypropylene resists sun damage, while the cone base and ribbed underside fight lateral slipping on soft or uneven terrain. Drain holes prevent water accumulation so blocks remain stable even after rain, and the anti-tilt geometry reduces rocking on gravel or grass.

• UV protection for long-term outdoor exposure
• Anti-tilt geometry limits wobble on uneven ground
• Drain holes keep water from pooling and degrading stability
• Durable material resists cracking and deformation under load

Who this is for: The TOWKING 4.3" H 12000lbs trailer jack block set is ideal for RV owners, boat trailers, van lifers and weekend campers who need a compact, durable leveling solution. If you want a single, travel-ready system that fits most jack feet, stabilizes heavy loads, and withstands weather and rough surfaces, this kit covers those needs without extra hardware or complicated setup.