Basima RV Trailer Jack Blocks 6in 4-Pack — 40,000 lb Capacity, Stackable UV-Resistant Leveling Pads

Basima 4-Pack 6in Trailer Jack Blocks are heavy-duty, stackable polymer leveling pads that support up to 40,000 lb to stabilize RVs, trailers and campers.

These 6-inch trailer jack blocks from Basima are made from a reinforced, UV-resistant polymer and designed to give a secure base for tongue jacks, stabilizers and foot posts on a variety of surfaces. The four-pack includes stackable units with easy-carry holes and a compact storage bag so you can adjust height, reduce sway and keep your rig steady at campsites, on drives or during maintenance.

How do these jack blocks keep my RV stable on uneven ground?

Basima jack blocks create a broad, solid contact area under jacks and stabilizers to prevent sinking and rolling on soft or uneven surfaces. The upgraded internal structure boosts load-bearing capacity and spreads weight to improve steadiness during use.

• Reinforced polymer with anti-UV additives resists cracking and weathering.
• 50% increased bearing capacity compared to standard blocks.
• Wide base design minimizes sinking on grass, dirt, gravel or asphalt.

Can these blocks be stacked or adjusted for different jack heights?

Yes—each 6-inch Basima block is stackable so you can tailor the total height to your leveling needs. The secure stacking profile locks units together so stacked height remains stable under load.

• Stackable design for height increments starting at 6 inches.
• Interlocking edges reduce slippage between layers.
• Side hand-holes make adding and removing blocks easier and safer.

Are these compatible with my trailer’s jack and stabilizer types?

Basima blocks work with most jack foot plates, round or square posts, and common stabilizer designs used on travel trailers, campers and yachts. Their broad top surface and tapered receptacle accept a variety of foot shapes without special adapters.

• Fits round and square tongue jacks and stabilizers.
• Large top platform prevents foot plate rotation or slipping.
• Useful for RVs, trailers, campers, support posts and marine applications.

How portable and durable are these blocks for travel use?

Built for outdoor use, Basima jack pads combine lightweight portability with durable construction so you can stash them in your vehicle and deploy them quickly. They come in a compact woven bag for tidy storage and transport.

• Includes a durable carry/storage bag for easy packing.
• Lightweight polymer construction avoids corrosion and heavy metal weight.
• UV-resistant additives help maintain strength and appearance over time.

Who is this for: Basima 6in trailer jack blocks are aimed at RV owners, tow vehicle operators, seasonal campers, boat owners and professionals who need a dependable, portable solution to level and stabilize trailers or support posts. If you want robust, stackable support that resists outdoor wear and works with most jack and stabilizer types, this four-pack provides a compact, heavy-duty option for safer setup, reduced sway and easier leveling wherever you park.