... ningbo factory cnc machining pipe sleeve copper sleeve Our Advantages :Over 12 years experienceHigh quality control,Competitive price, Fast ... 500mm Our OEM Serivce : 1) Material:Steel, Brass, Copper, Stainless steel, Plastic, Aluminium POM, Delrin, Titanium Alloy ... ) payment:T/T9) Packing:Foam, Carton, Wooden boxes Quality Control Process Raw Material Inspection => Production process => 100% ...