The industry standard Rol-AirR is the choice of professionals. Flares soft copper, aluminum and brass tubing. The faceted, hard chrome coated cone rolls out perfect 37? flares above the die block, and then automatically burnishes the flare face while maintaining the original wall thickness at the base of flare. New slip-on yoke permits use in tight quarters. Satin chrome and black finish. Flares tube sizes:3/16", 1/4", 5/16", 3/8", 1/2", & 5/8" O.D. tubing. Not recommended for stainless steel. Meets AS4330 (formally MS33584) aviation tube flaring standards. 3 lbs (1Kg) shipping weight.