Trane / American Standard BAYFTFR21M Aftermarket Panel Filter, 21x27x5, MERV 11BAY210AM $85.84 SKU: BAY210AM Back $85.84 Quantity -+ Add to Cart Details Trane / American Standard BAYFTFR21M Aftermarket Panel Filter, 21x27x5, MERV 11 DetailsBackDetailsTrane / American Standard BAYFTFR21M Aftermarket Panel Filter, 21x27x5, MERV 11See MoreSee Less