This 10" x 3" polyurethane on cast iron wheel rigid caster is a durable, high capacity wheel that fits almost any budget. Polyurethane tread is floor protective and non-scuffing. Our 75 Series casters are constructed from high quality heat-treated AISI 1045 laser-cut steel. A precision machined raceway combined with fully welded legs (inside and outside) and kingpinless design delivers superior strength in rugged applications. Kingpinless casters eliminate kingpin failure the leading cause of caster failure.