1. ISO9001:2000 2. OEM casting 3. Genuine manufacturer 4.ductile iron elevator parts ductile iron elevator parts:Materials: gray iron, ductile iron, carbon steel, stainless steel, alloy steel and aluminum Standard: ASTM, JIS, BS, DIN, EN, ISO Operation: green sand casting and resin sand casting Surface finish: sand blasting, sand blasting, oiled, zinc, nickel, chrome plating, painting, hot dip ...