... OEM casting 3. Genuine manufacturer 4.ductile iron elevator parts ductile iron elevator parts:Materials: gray iron, ductile iron, carbon steel, stainless steel, alloy ... fittings, grating, frame, manhole covers, pump parts, handwheel, valve, flange, bollard, pilingaccessories, counterweight iron, construction machinery parts and ... .contact : Tina zhangtinachina(at)163.com ductile iron elevator parts