We are professionally producing Precision parts in China, ISO9001 certified. We have the<br /> automatic CNC lathe and professional engineer to make our good precision parts. 1. All<br /> the precision parts: 1): Length: <4"(100mm); 2): Diameter:<0.8"(20mm); 3): Torerance:<br /> +/-0.0004"(0.01mm); If any