6" x 2" DH® Polyurethane Cast Iron Wheel - 1200 lbs. Capacity6" x 2" Polyurethane Cast Iron wheel (round non marking polyurethane tread on cast iron hub), 1200lbs. capacity, 1 2" precision ball bearing. Floor protective, resists oil, grease, water and most chemicals, Zerk fitting for bearing lubrication and Shore A Durometer 90 95. Applications: Drop Forged casters Medium Heavy Duty casters Heavy Duty casters Heavy equipment Model No. W MHD6PUC Wheel Type Round non marking polyurethane tread on cast iron hub