COMPATIBLE REPLACEMENT – Replacement Aluminum Mesh Filters Designed For Fresh Air Supply Fan Models S97021045, 97021045, AP6872391, And PS16529652. Includes 2 Filters For Easy, Reliable Replacement. ALUMINUM CONSTRUCTION – Made In The USA From High-Quality Aluminum Material With A Multi-Layer Mesh Design That Provides Maximum Filtration And Long-Lasting Performance. Overlapping Joints Prevent Snagging And Ensure Smooth Handling. VERSATILE FILTRATION USE – Designed For Fresh Air Supply Fans, These Filters Can Be Used As A Pre-Filter Or Post-Filter In Residential, Commercial, Or Industrial Ventilation Systems. WASHABLE AND REUSABLE – Filters Can Be Hand Washed Using Mild Dish Detergent And Warm Water. Soak For 1 Hour, Gently Brush To Remove Debris, Rinse, And Allow To Dry Before Reinstalling. ACCURATE DIMENSIONS – Each Filter Measures 9-1/4" x 9-1/4" x 3/32". Always Measure Your Existing Filter Before Ordering To Ensure Proper Fit And Compatibility With Models Such As FIN-180P, FIN-180B, FSFXXAOA11803, And Additional Units. Air Filter Factory UPC 842477120658