Caster Wheel 600 lb Load Rating 300 to 999 lb Load Rating Range 5 in Wheel Dia 1 1/2 in Wheel Width Phenolic Wheel/Tread Material Hard Rockwell 102 E Roller Standard Tread Shape 3/8 in For Axle Size Included Includes Spanner Bushing Phenolic Wheel Core Material Yes Non-Marking 1 3/4 in Hub Length