Oregon 30-107 Air Filter Replacement for Briggs & Stratton 491519, 399806, 399806S Fits 10 thru 12 HP IC vertical engines 253700, 256700, 280700 and 281700 series Use Oregon 30-924 foam pre-cleaner 8-5/8" L x 2.635" W x 2.7 H Replaces Briggs # 491519, 399806, 399806S