Uniweld MTR micro 6000 miniature rosebud tip provides a stable, consentrated flame even in windy conditions. Tip is capable of brazing up to 1 1/2" of copper. Tip elbow is copper, mixer and nut are brass. Has two O-Ring seals so tip nut only needs to be firmly hand tightened. Tip will fit either the 71 or WH550 welding handle.