... High precision aluminum hardware part for oil pump 1.Item name:Hardware part. 2.Specification:Hardware part can be ... plating/chromeplate.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 ...