... 25kg per caster 2.Wheel diameter:40~50mm3.Caster material: Rubber,pressed steel,zinc plated4.Chrome, zinc or nickel plating available ... 5.Matches with different fittings such as swivel, fixed ,double brake plate 6.Plastic or nylon is ravailable 7 ... . Our wheel diameter is from 15mm to 300mm, materials include rubber, TPR, PU, plastic, nylon, cast iron, pneumatic, phenolic and sandwich ...