... quality Features:SUS304 Precision Turned Parts Connecting screw male and female 1.Material:sus304, sus303, SUS3162.Standard :DIN,JIS, ISO ... nickel plating, gold plating, chromated4. Appearance: clear shiny surface, with complete neat body.5. Inspection: in house test are available ... . We have the responsible QC, Engineers and after sale worker to deal with such things.In case this thing happened, ...