Tube benders *For:1/4",5/16"&3/8"size O.D. tubing. *Material: Al alloy body *Can bend ... without distortation CT-368-180°-AFor:1/4",5/16"&3/8" size O.D. tubing. CT-368-180°-M For:6mm ... any point,can bend 0.4mm thin tube without distortion.(3)Calibrated marking for making accurate left-hand,right-hand,and ...