1. Material: Aluminium 6061 2. Specification: Dia5-20mm, Len6-40mm 3. Finish: Black Andoizing 4. Checking: ISO9001:2008 / BV The following is showed in detail about this product: Product Name CNC metal machining parts Material Aluminum,stainless steel Machine Technics Auto Lathe Surface Treatment Nickel,Zinc Quality Certificate ISO9001:2008 MOQ 1,000pcs Packing Carton Box or as per custormer's ...