Service Caster listing is for set of 5 (five) Softech heavy duty furniture and light equipment twin wheel casters with 3" (75mm) high-tech thermoplastic elastomer wheels and grip ring stems. An excellent choice for replacing nylon body and wheel casters that damage floors. Dependable twin wheel caster for chairs, tables, plant stands, ottomans, furniture and light equipment where easy rolling, quiet operation, and more importantly, floor protection is desired. Provides optimum performance on all furniture, medical equipment carts, hospital supply carts, computer carts, display stands and much more. 165 pound capacity per caster. Grip ring stem size: 7/16" diameter; 7/8" length. Quality twin wheel casters featuring high-tech thermoplastic elastomer (think soft rubber) wheels. Non-marking, non-marring Softech wheels are ideal for ALL floor surfaces, including hardwood floors and tile floors.