Lawnmower replacement filter for B&S engine.
1. H: 22 mm. 2. ∮: 133 mm. 3. ∮: 114 mm. 4. Fits B&S FILTER 5. OEM #491588/399959, 491588S, 494245 6. Size: 5 1/4 L x 4 1/2 W x 3/4 HT. 7. For 3.5 thru 5.5 HP (12 CID) Quantum model series 120000 engines (after 1989) and 3 and 5 HP IC horizontal (13 CID) and 6 HP vertical.