... 3.Samples:free samples 4.Certificate: ISO9000,CE stainless steel quick coupling Specifications:1,Material: 304,316,316L,304L,CF8,CF8M ... : with free samples 4,Applications: gas, water, oil, and some corrosive liquids. Casting method is investment casting.5,Standard ... Advantage:Experience: we have 8 years Casting&Machined experience, and have first-class production line.Precision Invest Casting: Wax:162 ...