Joint Connector Bolts 1.Material:copper/brass/bronze 2.Tech:cnc turning/milling/machining etc 3. ... 24 hours. Our main products as below:Materials: stainless steel, copper, steel, aluminum alloy, zinc alloy,etcDifferent kinds of finish available ... 24 hours. Our main products as below:Materials: stainless steel, copper, steel, aluminum alloy, zinc alloy,etcDifferent kinds of finish available ...