... /GG25 Sand Casting V Belt Cast Iron Pulley 1)material:gray iron GG20,25,30 2)technics: ... GG20/GG25 Sand Casting V Belt Cast Iron PulleySpecification:Materials: gray iron HT200 and HT250Surface finish: polishing, ... Iron, Ductile Iron,Carbon Steel, Stainless steel, Alloy steel, Aluminum, Aluminum alloy etc.StandardISO, GB, ASTM, DIN, JISEquipmentmelting furnace, centrifugal casting machines coated ...