... :250g 3.Type: cnc machining 4.Finish: Zinc/Chromat nignbo factory cnc precision machining stainless steel pulley Our Advantages :Over 12 ... OEM Serivce : 1) Material:Steel, Brass, Copper, Stainless steel, Plastic, Aluminium POM, Delrin, Titanium Alloy etc.2) Surface treatment:Zinc plating ... by QC => Packaging => Final Random inpsection by QA Products pictures:Factory pictures:ISO 9001:2008 Certificate: