REPLACEMENT AIR FILTER STIHL 4149 120 1800 SPECIFICATIONS:WIDTH 2 3/4" LENGTH 2 13/16" HEIGHT 7/16" FITS: STIHL FC100, FC110, FC90, FC95, FR130, FS90R, FS100, FS100ARX, FS110, FS130, FS310, FS87, FS90, FT100, FX130, HL100, HL90, HL95, HT100, HT101, HT130, HT131, KM100, KM110, KM130, KM90 AND SP90 REPLACES OEM:4149 120 1800 REPLACES AFTERMARKET: 100-705, 14085, 30-643, 418012, 7-083229, B1AF460, FS-401, ST100705, ST-401, ST4180, 120, 1800