Air Filter / Stihl 1130 124 0801Pack Size:1Stihl 1130 124 0800, Stihl 1130 124 0801HL Supply S43701, Oregon 30-156, Rotary 11580Stihl 017, 018, MS170 and MS180 chainsaws Length: 3 1/2", Width: 2 1/2"