FEATURES * See NOTES below for Serial #'s this part fits * Includes all parts as shown FITS: Switch weldment MODEL(S) THIS PART FITS: M11, M11D, M9, M9D NOTES: CHECK SERIAL NUMBERS HERE: FITS M9-001 thru -019 with Serial # prefixes CZ, DA, DB, DX, DY, FD & OM. FITS M9D-001 thru -019 with Serial # prefixes FF & FG. FITS M11-001 thru -019 with Serial # prefixes ES, ET, FP, FR & GB. FITS M11D-001 thru -019 with Serial # prefixes GC & GD.