AME Super Stacker Cribbing Block Size:4" x 4" x 18" The tube has a non-clogging

The tube has a non-clogging design with a cut-out in the front to allow for easy soil removal

There's a revolution going on in work shoes

pistol-grip rings are D-shaped with 9/16" inside width

White only

AME Super Stacker Cribbing Block Size:4" x 4" x 18" The tube has a non-cloggingSuper 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.