The Shepherd Hardware Soft Rubber Casters give mobility to heavy loads on smooth hard surfaces and finished concrete floors where quiet movement and floor protection are major considerations. These Grip-Ring Stems are a great option for equipment and furniture that require stem casters. The Shepherd 9008 model features a 2 inch diameter wheel, 90-lb load rating, and a 3/8 inchx 1 inch Grip Ring Stem.