... copper sleeve 1.Material: copper/brass 2.Weight:270g/150g 3.Type:CNC turning 4.Tolerance:+/-0.05mm ningbo factory cnc machining pipe ... sleeve copper sleeve Our Advantages :Over 12 years experienceHigh quality ... 1020mm*500mm Our OEM Serivce : 1) Material:Steel, Brass, Copper, Stainless steel, Plastic, Aluminium POM, Delrin, Titanium Alloy etc ...