Uniweld MTW-1 Micro 6000 Miniature Weld/Braze Tip Proudly Made in the USA and 100% Flame Tested Provides pinpoint concentrated heat in tight spaces Capable of welding up to 3/64in and brazing up to 1/2in of copper Tip elbow is copper, mixer and nut are brass Fits either the 71 or WH550 welding handle