... our high-precision cold drawn pipes are devied into three categroies:1. cold drawn pipes and cold rolled tubes outside ... 120mm wall thickness:0.5mm~5.0mm2. cold drawn pipes of square and rectangular the length:10mm~70mm wall ... thickness:1.0mm~5.0mm3. cold drawm pipes of ellipse long axis:27mm~114.5mm short axis ... the status of aluminum alloy supplied by the country inside:Y,Y2,O,B,BM,M,MO,CZ,CZO ...