HIPA (Pack of 5) Air Filter 1110 120 1601 for STIHL 041 Chainsaw (4-3/8" x 4-1/4") Replacement manufacturer part number: 1110 120 1601 Fitment models: STIHL 041 chainsaw Length: 4-3/8 inch, Width: 4-1/4 inch Check your size carefully to make sure it fits Package include 5pcs air filter