HURI 6 Air Filter Pre Filter for 3.5-6 HP Quantum engines Replace Briggs & Stratton 491588 491588S 4915885 399959 Oregon 30-710 Replacement parts,non original Length:5-1/4" Width:4-1/2" Height:13/16" Fit Briggs & Stratton 491588 491588S 4915885 399959 Package include 6pcs air filters + 6pcs pre filters + 1pc HURI pocket tape Note:you could apply for a full refund if you didn't receive HURI branded pocket tape.