+ISO9001:2008 CE RoHS for OEM Sheet Metal Steel Box +Provide OEM service Specification: ShenZhen YongPingTong could make all metalworks according to your requirement 1 Processing of heat sinks: precision cutting, drilling, skiving,deburring,fine blanking,soldering,bonding, punching, stamping,milling, CNC machining,polishing 2 surface treaments for heat sink clear anodizing, oxidation process, ...