... color 3.Fine workmanship 4.Quality consistence Precision copper pipe fitting part Product detail: 1.Material:Brass H59 ... etc.5.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, ...