Specifications: 1)material of the caster: tpr 2) size of the caster: 3" 4"5" 3) load cap: 30, 40, 40kg 4) fork of the caster: steel 5)optional stem: m12x20mm 6)bearing: single bearing 7) zinc plated finish for corrosion resistance 8) zerk fitting in swivel race for lubrication 9) hardened raceway available 10) turn quickly, load big weight, beautiful, wear resisted The material and the stem can be changed as customers' request. Wooden case or carton
