Bronze pipe coupling 1.Investment cast 2.Material C92200 3.Thread1/4NPT 4.Mainly used in water treatmet,industrial ... mainly business, we could supply sand casting and investment bronze and brass pipe fitting with material: C83600, C87600, ... CMM measure, Material Chemical check, Water/Air Pressure check, Mechanical Property, Yield Strength, Tensile Strengh inspection. Bronze water valve body