2 Pack Air Filter Tune Up Kit for Stihl Trimmer's.

Kit Includes:
(2) Air Filter
(2) Fuel Filter
(2) Spark Plug

Fits Models: BT131, FC111, FC91, FC96, FS111, FS89, FS91, HT101, HT102, HT103, HT105, HT132, HT133, KM111, and KM91.

Replaces OEM: 4180 141 0300, 0000 350 3521 and CMR4H.

Specifications:
Length: 3"
Width: 2 3/4"
Height: 7/8"