4" Caster Wheel, 700 lb. Load Rating, Wheel Width 1-3/4", Cast Iron, Fits Axle Dia. 1/2"

Iron tread wheels provide smooth rolling under heavy loads. They have excellent resistance to abrasion and shock, and they are suitable for rough surfaces such as concrete and wood block floors. Iron wheels withstand exposure to corrosive chemicals, grease, or oils better than steel. They also resist extreme temperatures. They are used in warehousing and manufacturing applications. Iron will rust if exposed to water, so these wheels are best suited for dry environments.

Metal tread wheels offer very high weight capacities and can withstand shock, abrasion, impact, rough use, and exposure to temperature extremes. The wheels' tread and core are manufactured as one piece from the same material. These wheels are suitable for use on carts, racks, trucks, trolleys, and similar equipment that will be carrying heavy loads over broken floors or debris. Metal tread wheels are heavier than wheels with rubber or plastic treads and are more likely to damage floors.