AIR FILTER COMPATIBLE WITH : STIHL brushcutters: FS 38, FS 45, FS 46, FS 55, KM 55 STIHL hedge trimmers: HL 45, HS 45 STIHL lawn mowers: FC 55 height in mm: 6.50 Air filter design: flat width in mm: 63.50 length in mm: 67.00 CODE: 176-956 ORIGINAL CODE: STIHL 4228 124 1500 CZ