ROBLOCK 6" Trailer Jack Block — 6-inch RV Stabilizer Block, Heavy-Duty Polymer, 11.6" Base, 1-Pack

ROBLOCK 6-inch trailer jack block is a rugged, high-performance polymer stabilizer that raises and stabilizes trailer jacks, posts, feet and scissor stabilizers for safer, steadier RV leveling.

Designed for RV owners who need a reliable, lightweight alternative to wood or concrete, this single-pack jack block gives extra height, prevents sinking on soft ground, and reduces wear on jack mechanisms. Made from weather-resistant polymer with integrated drainage, a wide base and a secure interlocking stack system, it performs across campsites, gravel pads and seasonal conditions. The 6" profile makes it easier to lift your travel trailer or fifth wheel without overextending the jack, while the molded handle and rope keep transport simple and clean.

How does this block improve stability on soft or uneven ground?

The ROBLOCK block spreads weight across a broad footprint to stop jacks from digging into sand, mud or grass. Its one-piece construction resists flex and the low center of gravity minimizes sway, creating a firmer foundation for living and towing systems.

• Wide 11.6" x 11.6" base reduces ground pressure and sinking.
• G.V.W. rating up to 40,000 lbs supports heavy tongue loads.
• One-piece polymer resists cracking and holds shape under load.
• Integrated drainage keeps water from pooling beneath the jack foot.

Will these blocks make leveling faster and reduce jack wear?

Yes — the extra 6 inches of height means you won’t need to crank the jack as far, shortening the travel required to lift and level your trailer. Less extension reduces strain on the jack’s gears and threads, extending component life and simplifying setup.

• Extra 6" height reduces jack extension and operating cycles.
• Interlocking profile lets you stack precisely for incremental height adjustments.
• Lightweight 2.81 lb design is quicker to position than heavy wood blocks.

How portable and durable is the ROBLOCK design for extended travel?

ROBLOck blocks are engineered to travel: they’re light, nestable and resistant to sun, mud and oil. The molded handle and included rope let you carry one block easily or link several when moving between campsites, and the material won’t rot or splinter like wood.

• Each block weighs only 2.81 lbs for easy handling and transport.
• Nestable/interlocking stack design saves storage space in compartments.
• High-performance polymer resists UV, oil and moisture for long life.

What jacks and RV setups are compatible with this block?

The 11.6 x 11.6 x 5.91" footprint fits most tongue jacks, wheel jacks, scissor stabilizers, and foot plates on travel trailers and fifth wheels. Its round and square opening profiles accept various jack foot shapes for broad compatibility across RV makes and models.

• Works with tongue jacks, wheel jacks and scissor stabilizers.
• Supports round, square and flat jack feet securely.
• Suitable for use on snow, gravel, sand, grass and compacted dirt pads.

Who this is for: RV owners, weekend campers and professional tow operators who want a durable, lightweight stabilizer that speeds setup, protects jack hardware and prevents sinking on soft surfaces. If you prefer a reusable, non-rotting alternative to wood or concrete and need compact storage and easy handling, this ROBLOCK 6" jack block is built to make leveling quicker, safer and more reliable.