Air Filter / Dolmar 038 173 101Pack Size:1Dolmar 038 173 100, Dolmar 038 173 101, Makita 038 173 100NHC 203-7166, Ratio Parts 176-563Dolmar PS6400, PS7300 and PS7900; Makita DCS6401-20, DCS7301 and DCS7901Width: 2 1/2 ", Length: 3 ", Height: 1 1/4 "