A:Product Description1, 15years investment foundry in Ningbo,China2, Material:A3 carbon steel.3, Weight=350g4, Process:investment ... holes,zinc plated.6, Used in door&windows industry.7, Place of origin in zhenhai,Ningbo,China8, Tolerance in CT7-8 grade.9, Sampling ... in one month and production ability in 10ton per month ...