The Whirlpool W10535950 Grease Filter helps capture grease and cooking particles from air before they accumulate inside the microwave ventilation system. Designed for compatible over-the-range microwaves, this filter works by trapping airborne grease released during cooking as the ventilation fan draws air through it. Regular use helps reduce grease buildup around the vent and interna... https://www.partsmelange.ca/whirlpool-w10535950-grease-filter-for-microwave