... Al60614.Surface treatment:Black anodizing.5.Craftsmanship:CNC,lathe,milling machining,grinding machining,wire-cutting, ... Nickel plating.Inspection tooling:Outer micrometer, inside micrometer(machine),digimatic micrometer, internal micrometer, mechanical caliper , ... vernier caliper ,caliper(digital),caliper(machine),caliper(dial),diameter scale, depth micrometer, digital caliper ...