Replacement Caster for Shelf & Utility Carts, Load Capacity 300 lb, Caster Wheel Dia. 5 in, Caster Wheel/Tread Material Polyurethane, Caster Stem Diameter 27/32 in, Caster Stem Length 2 3/16 in, Caster Wheel Type Standard, Caster Wheel Width 1 1/4 in, Mounting Type Stem Caster, 1 Pair