Harris® 2393-2F Oxygen/Acetylene/Hydrogen Straight Heating Tip with 1/2" - 25(M) fits 43-3, 18-5, 63-2 and V-315-C handles. Tip with 1/2 - 25(M) mixer tip thread has a tube of length 28" - 180 deg. It is used for large alternate fuel heating applications.