aluminum alloy 6063 fax machine parts Specification: Diameter 10MM, 20MM,30MM or as your requirements. Height: 5MM,10MM,15MM,50MM or according you choose Hole size M2,M3,M4 or your demand. Product detail information: MaterialAluminum alloy 6063-T5,zinc alloy,stainless steel etc.Treatment surfaceElectroplated, silver anodized,silver..