21x21.5x5 (20.1x21.1x5) MERV 13 Trane Aftermarket Replacement Filter

Trane Perfect Fit air filter #BAYFTAH21M, TFM215A0AH00, TFM215A0AH10, TFM215B0AH01, TFM215B0AH0ANominal size 21" x 21 1/2" x 5" (Actual Size 20.1" x 21.1" x 5")98% efficient filtration media.Aftermarket replacement filter.Up to twenty times more effective than ordinary fiberglass filters.High efficiency filter media collects small dust particles before they can collect on your coils.No assembly required...no combs needed...filter just slides right in!What is MERVLasts up to 6 Months