1.Material: carbon steel, 45#,35#, 20# 2.surface treatment: zinc plating, salt spray test 3.high precision in size 1.perfect surface finish,smoothness without burrs and impurities.2.high precision according to standard. make specific fittings 3.competitive price and reliable quality4.samples in small quantity can be free for youProduction process: 1.material preparation 2.Instrument lathe ...