Vacallity RV Trailer Jack Block – 16,000 lb Heavy-Duty Stabilizer for 5th Wheels

Stable, versatile support for on-the-road RV setups

Designed for serious camping adventures, Vacallity's RV Trailer Jack Block is a compact, one-pack solution that helps stabilize your trailer on uneven ground. With a robust 16,000-pound capacity, this block aims to provide a steady base for tongue, wheel, and fifth-wheel jacks when parked on gravel, grass, or uneven concrete. The result is a calmer, more controlled leveling process that lets you focus on securing connections and enjoying your stop without second thoughts about the terrain beneath you.

The block’s sturdy build and thoughtful sizing work behind the scenes to reduce wobble and shifting. While results can vary with ground conditions, the design is intended to offer predictable support when weight is distributed across the top surface. This can help you approach each setup with a clearer sense of stability and control, especially after a long drive when fatigue can affect your footing and attention.

Durable material, broad compatibility, simple setup

Crafted from high-density polyethylene (HDPE), the block resists weathering, everyday wear, and the rigors of outdoor use. The material choice supports long-term reliability and makes the block feel ready for another weekend excursion, rain or shine. The design is also versatile enough to pair with a range of jacks and accessories—scissor jacks, tongue jacks, leveling pads, wheel jacks, stabilizers, and more—so you can adapt to different trailer configurations without swapping components.

One of the standout conveniences is the no-tool installation. You can place the block under a jack foot and proceed with leveling and stabilization without fiddly setup steps. This simplicity can save time and reduce the hassle of campsite preparation, which matters after a day of driving or when you’re setting up in less-than-ideal conditions.

Designed for stability, height, and ease

The blocks are stacked to increase height as needed, with a compact footprint that helps prevent overhang and confusion during placement. An anti-slip surface texture adds friction to resist movement on soft ground, contributing to a steadier feel as you dial in height and alignment. The result is a practical, tangible improvement in how your trailer sits once the leveling system is engaged—and a smoother disassembly when you’re ready to move on.

What you get and key specs

• Top dimensions: 9.3 x 6.9 inches; bottom footprint: 4.7 x 3.2 inches
• Load-bearing capacity: up to 16,000 pounds
• HDPE construction for outdoor durability
• No-tools required for setup
• Broad compatibility with jacks and stabilizers
• One 1-pack per purchase for lightweight camping kits

Key benefits at a glance

• Durable HDPE for outdoor use and long life
• Broad compatibility with common trailer jacks
• Anti-slip design improves stability on varied surfaces
• No-tools needed, enabling quick setup
• Strong load capacity suitable for several jack types
• Compact footprint, easy to pack and carry