N2 Air Filter Replaces Briggs & Stratton #(s) 4213, 697152, 698413, 797007, 794421 Replaces Briggs & Stratton #(s) 4213, 697152, 698413, 797007, 794421. Fits Briggs & Stratton models 21A902, 21A907, 21A977, 21B902, 21B906, 21B907, 21B972, 21B976 & 21B977; 10 HP overhead valve engines. You can return this item (for any reason) if you ask for a return within 30 days of receiving your order and have not installed your product Warranty: This part shall be free from defects in material and workmanship under normal use and service for three-months from the date of purchase