If you have a standard torch handle with a standard size hose, this torch head will require the F 27 R and F27 L adapters to fit snugly around the fitting and torch. Hook J on this handle should be tight (do not twist). After receiving it and everything was neat, this burner handle has excellent flame control. 5 psi C2H2 8 psi O2 First light the acetelline so you have a 3 inch flame, then open the oxygen slightly to get five nice blue flames. 40 seconds to cherry 7/8" copper!