2 Air Filters For Stihl Air Filter Part Number 4229 120 1800 or 4229 124 1500 2 Quality Aftermarket Air Filters Replaces Stihl Air Filter Part Number 4229 120 1800 or 4229 124 1500 Width: 2-3/8", Length: 3", Height: 1/2" Woven fabric; one piece air filter and pre filter