OEM air filter from Stihl. Keep your chainsaw running efficiently with a clean air filter. This filter has a fleece (flocked) material on the surface that picks up fine particles of dust. They filter very well (which is a good thing), but tend to ice up in sub freezing conditions. We recommend a nylon mesh or wire mesh filter for frozen sawing. Filters can load up quickly, so we recommend having a couple of spares handy. This is the top half of the air filter only. This filter fits older models 034, 036 chainsaws, see specs below.