Air Filter / Stihl 1127 120 1621Pack Size:1Stihl 1127 120 1621, Stihl 1127 120 1620Ahlborn ST300, J. Thomas SL-294, J. Thomas CS-5679, Laser 43705, NHC 203-7192, Ratio Parts 176-565, Rotary 12305Stihl MS290, MS310, MS390 and 029 with IntelliCarbTMWidth: 1 1/2 ", Length: 4 5/8 ", Height: 2 5/8 "