Big size elbow casting 1. Accurate dimension; 2. Professional casting skill; 3. Complete requirements 4. High quality Feature:Material: Iron, self-smelting according to ... : ASTM, EN, DIN, ISO, JIS, GB, etc;Sand mold casting: Iron casting, through sodium silicated-bonded sand and/or resin sand ... , GB Machining tolerance: unless otherwise according to dwg or requirement; big size elbow casting