16x21x5 Accumulair Replacement Filter for White Rodgers

Replacement for OEM Part/Model Numbers: ACB1000, ACM1000, FR1000-100

Product Features:

• Nominal Size: 16x21x5
• Actual Size: 16.25x21x5
• No assembly required.
• Easily inserts into and out of existing return grille.
• Lasts Up to 6 Months