casting gear box 1.ISO 9001:2000 certification. 2.Material: ductile iron, grey iron, steel 3. Weight: 0.1-150K casting gear box1.Material: ductile iron ... , grey iron, steel, under ASTM, ISO,DIN, GOST,SS standards. 2. Weight: 0.1- ... delivery, welcome to contact us.casting productsISO CERTIFICATIONMATERIALOUR COMPANY casting gear box ductile iron gg40