Reliable stabilization of heavy machinery with better longevity than wood

Super Stacker Cribbing Block is perfect for stabilizing heavy machinery like trucks and tractors. Wood crimping doesn't even compare! This 100% recycled plastic cribbing is resistant to gas, oil and chemicals. In fact, there's a 50-year warranty against splitting, rot, fluid absorption, termites and mold. Multiple sizes and shapes fit most applications.

• 4" x 4" x 18" block has a 45,194-lb. working load limit and weighs 7 lbs.
• 6" x 7" x 24" block has a 110,010-lb. capacity and weighs 24.4 lbs.