The OEM Replacement Part is an Air/Grease Filter used in Samsung microwaves. It measures approximately 6" x 7" in size. This component is designed to be installed underneath the microwave above the stove top, facing downward. Its primary function is to trap grease, smoke, and odors from the exhaust air during cooking.  Causes of a faulty Air/Grease Filter include excessive buildup of grease and grime over time, physical damage or warping, or simply reaching the end of its effective lifespan. Symptoms of a bad Air/Grease Filter include: Reduced airflow or suction from the range hood Lingering cooking odors in the kitchen Visible grease buildup on the filter itself This OEM part is compatible with Samsung range hoods and over-the-range microwaves, as well as select models from other brands, including Kenmore.DE63-00666A (AP5306190) replaces 2309683, PS4228252.