When searching for a reliable and durable solution to your Metro replacement caster needs, consider Service Caster’s Series 20 top plate thermoplastic rubber donut tread on polyolefin core casters. The rounded face "donut" style soft tread is made of thermoplastic rubber that is non-marking, non-marring and provides easier mobility over standard flat tread wheels, resulting in a long lasting, high capacity wheel capable of easy rolling under heavy loads. Finely crafted with double ball bearing heat treated raceways, these versatile casters are ideal for a wide range of applications, such as dollies, platform trucks, warehouse carts and freight terminals. Or ensure a smooth and secure ride for food service carts, hotel housekeeping carts, and industrial and commercial equipment. Even drywall carts, welding carts, and wall panel carts will be ready to roll on the Series 20, keeping you moving forward. These casters are commonly used on Metro truck dollies. Service Caster is unsurpassed in quality, reliability, and excellent customer service. Count on us to move you forward. NoFlag