Uniweld Type17TFT Tuning Fork Tip for Defective Reversing Valve Removal Proudly Made in the USA and 100% Flame Tested Allows you to heat up all the fittings of a heat pump reversing valve at once for easy removal of the defective valve Tip elbow is stainless steel, mixer and nut are brass Has two O-Ring seals so tip nut only needs to be firmly hand tightened Fits either the 71 or WH550 welding handle