Brass quick coupler: 1.Mat:Copper H59 2.Type:SK-306;SK-309;SK-311;SK-313;SK-319, 3,Valve Open ... 4.Technics:CNC LATHE Brass quick coupler:high quality mold coupling,firmly and ... Water, Grease, Air & Oil.Connectors manufactured from solid Brass Locking rings, springs and 6 locking balls are all ... products to meet our customer's special requirement. Brass quick coupler