367-FH For 1/8", 3/16" and 1/4" (3 mm, 4 mm and 6 mm) O.D. tubing. 9/16" (14.2 mm) radius to center of tube. Calibrated markings for making accurate left-hand, right and offset bends. Ninety degree start requires less effort – making bending fast and easy. For soft copper, aluminum and steel