... specifications:1.Furniture casters,Load capacity: 20~25kg per caster 2.Wheel diameter:40~50mm3.Caster material: Rubber,pressed steel ... Our wheel diameter is from 15mm to 300mm, materials include rubber, TPR, PU, plastic, nylon, cast iron, pneumatic, phenolic ... different usage, such as, for industrial machine, medical facility, furniture, trolley, shopping cart, forklift, scaffold, shelf, etc.Welcome ...