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