1.Diameter:160~200mm 2.Load capacity:450kg~600kg 3.Mold on rubber caster.Good quality. Reasonable price. 1.Product specifications: ... per caster 3.Wheel diameter: 160mm, 200mm 4.Caster material: mold on rubber wheel and stem scaffold fork 5.Chrome, zinc ... wheel diameter is from 15mm to 300mm, materials include rubber, TPR, PU, plastic, nylon, cast iron, pneumatic, phenolic and sandwich, etc ...