... /pipeDescriptionWe take the most advance technology in copper process, Rolling-Casting. Inner-grooved Copper Tube is of high cleanliness and super ... 100% no pin holeStandardAISI, ASTM, BS, DIN, JIS, ENMaterialRed copper, brass copper, and so onOutside Diameter4mm~60mmWall Thickness0.25mm~5.0mmLengthas your ... .+86-022-26346801FAX.+86-022-26346802Websitewww.tjzdgl.com.cn Copper tube T1 T2-high quality