5-Pack of Air Filter Tune Up Kit: 
Fits for Stihl FS89, FS91, FS111, FS131, FS311, FS89R, FS91R, FS111R, FS111RX, FS131R Weedeater String Trimmers
Fits for Stihl FC91, FC96, FC111 Edger and HT102, HT103, HT132, HT133 Pole Saws and BT131 Earth Auger
Fits for Stihl KM91, KM111, KM131, KM91R, KM111R, KM131R Kombi Engines

Replace Part Numbers: 
4180-141-0300-B, 4180-141-0300 for Stihl FS91R Air Filter
0000-350-3521 for Stihl FS91 Fuel Filter
0000-400-7011 for Stihl FS91R Spark Plug


Package List: 
5 x Air Filter, 5 x Gas Fuel Filter, 5 x Spark Plug, 5 x Primer Bulb.

Replacement for Stihl FS91 FS91R FS111 FS111R FS111RX FS131 FS131R KM91R KM131R FC91 FC111 String Trimmer Edger Weedeater Parts