Twin Wheel Caster 1.MOQ:5000 pcs. 2.Material:Plastic and ... .Wheel Diameter:30mm,40mm,50mm,60mm,etc. Gerbon's Funiture Twin Wheel Caster Product details:Material: NylonPA wheel+PU edge+MetalWheel ... :45KGSize for (Height*Width) 38*46mm,46*56mm Screw Length Size Usage:Desk Office Chair,Furniture,Cabinet,etcCertification & Service:SGS,ISO9001 ...