FiltersFast Compatible Replacement for Trane 21" x 26" x 5" (Actual Size: 19 7/8" x 25 1/4" x 4 7/8") Perfect Fit Filter BAYFTAH26M MERV 13 2-Pack Dimensions: 21" x 26" x 5" (Actual Size: 19 7/8" x 25 1/4" x 4 7/8") Replace every 6 to 12 months. MERV Rating: MERV 13 2-Pack For Added Convenience Made in the USA!