Caster materials: Polyurethane with stainless steel roller bearing ,pressed steel,zinc plated, or pressed stainless steel,double ballrace swivel head, dustproof seal housing.Loading capacity: 60 to 150kg per caster Wheel diameters: 100, 125, 160 or 200mm Available in chrome, zinc or black nickel platings Matching with various fittings such as swivel or fixed plate, stem, threaded stem and bolt hole Available in rubber, hard rubber, elastic rubber, plastic, nylon, cast iron and PU wheels Available in usual, light or strengthened styles Caster with or without brake available Assorted colors (optional) Complies with international quality standard: ISO 9001:2000 Applications: factory machinery and public area