... /GG25 Sand Casting V Belt Cast Iron Pulley 1)material:gray iron GG20,25,30 2)technics: ... Cast Iron PulleySpecification:Materials: gray iron HT200 and HT250Surface finish: polishing, anodizing, hard anodizing electrophoresis, zinc, nickel, chrome ... surface treatment →product checking→ packing →deliveringCasting MaterialCast Iron, Grey Iron, Ductile Iron,Carbon Steel, Stainless steel, Alloy steel, ...