FEATURES * 1/2" MPT x 1/2" FPT * Brass body * Cracking Pressure: 40 PSI * Also available, Black Nylon Elbow Barb (RPI Part #RPF684) * See NOTES below for Serial #'s this part fits FITS: Chamber MODEL(S) THIS PART FITS: M11, M11D, M9, M9D NOTES: CHECK SERIAL NUMBERS HERE: FITS M9-020 thru -022 with Serial Number prefixes RN, RP, RR, and V1000 to V721880. FITS M9-001 thru -019 with Serial # prefixes CZ, DA, DB, DX, DY, FD & OM. FITS M9D-020 thru -022 with serial number prefixes RW, RX & V1000 to V721880. FITS M9D-001 thru -019 with Serial # prefixes FF & FG. FITS M11-020 thru -022 with serial number prefixes RS, RT, RV & V1000 to V721880. FITS M11-001 thru -019 with Serial # prefixes ES, ET, FP, FR & GB. FITS M11D-020 thru -022 with serial number prerfixes RY, RZ & V1000 to V721880. FITS M11D-001 thru -019 with Serial # prefixes GC & GD.