Tube benders *For:1/4",5/16"&3/8" size O.D. tubing. *Material: Al alloy ... marking, scraping or flattening of tubing CT-368-90°-A For:1/4",5/16"&3/8" size O.D. tubing. CT-368 ... -90°-M For:6mm,8mm&10mm sizen O.D.tubing Note: (1)Aluminum ... bend 0.4mm thin tube without distortion.(3)Calibrated marking for making accurate left-hand,right-hand,and offset bends 90 ...