Shepherd Hardware 4-Inch Swivel Plate Caster, Rubber Wheel, 250-lb Load CapacityThe Shepherd Hardware 400 Series Thermoplastic Rubber Casters are lightweight, non marking wheels that are impervious to water and have strong chemical resistance. These casters are a long lasting, economical alternative to other industrial caster materials. The Shepherd 9735 model features an 4 inch diamteter wheel, 360 degree swivel mount, and a 250 lb load rating. Shepherd 400 Series casters are recommended for tool boxes, bakery racks, dollies,