SPA/B/C belt pulley, 1.Good hardness and strength 2.Good anticorrosive capability 3.Long life 4.Competitive price SPA/B/C belt pulley,1. Feature MaterialCast iron,steel, plastic,ect.ProcessingSan CastingStandardJIS,DIN,ASTM,GBMin. Tolerance0.05mmMachineLathe.CNC,Drilling Machine,Milling Machine,Boring Machine,Planing MachineSurface TreatmentPainting,Spraying,Galvanzation 2.Various type with ...