100-705 Stens Air Filter.
Replaces:
Stihl 4180 120 1800
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
Specs:
Woven fabric and foam
Height: 1/2"
Length: 2 5/8"
Width: 3"