Gravel Tuff GTF-08SCFF 8" Swivel Flat Free Caster Gravel Tuffs Swivel Caster will get your equipment where it needs to go Made of high-density polyurethane material with a sawtooth tread for a flat-free tire This caster is the ideal size with a wheel diameter of 8; has a weight capacity of 250 pounds! The zinc-plated finish adds even more durability and long-lasting quality to this great product; features a greasable zerk 1 year limited Manufacturers warranty