MaxPower 334305 Briggs and Stratton Replacement Air Filter

Replaces Briggs & Stratton #491588 & old 3999959. Fits Model series 120000, 3.5, 4 & 5 HP Quantum lawn mower engines and 3 & 5 HP horizontal shaft engines. Size 5-1/4" x 4-1/2" x 1" thick.