2 Air Filters Plus 2 Pre-Filters Replace Briggs & Stratton Air Filter 394019, 394019S, 398825 Pre-Filter 272490, 272490S, 271271. Also Same As John Deere AM38990 2 Quality Aftermarket Air Filters Plus 2 Pre Filters Air Filters Replace Briggs & Stratton 394019, 394019S, 398825, 398825S Pre-Filters Replace 272490, 272490S, 271271, 27271S Width: 3-3/16", Length: 9-11/16", Height: 2-1/2"