24" X 48" ALUMINUM RETURN FILTER GRILLE FOR 1" FILTER - EASY AIR FLOW - LINEAR BAR GRILLES Width_12in + How To Measure a Suitable for all AC 8in diameter 12125SDCLNGBX

+ How To Measure a Grille Before You Buy Duct Opening Size:

actual front end outer dimensions are 7" width X 7" height

+ Product Details Perfect Fit & Easy Sizing - Designed for a 12" x 10" or 10" x 12" duct opening (measured at the opening)

+ Product Description Introducing HVAC Premium's Aluminum Adjustable Return Grill – the key to enhanced air control and energy efficiency

24" X 48" ALUMINUM RETURN FILTER GRILLE FOR 1" FILTER EASY AIR FLOW LINEAR BAR GRILLES Width_12in + How To Measure a Suitable for all AC 8in diameter 12125SDCLNGBX + How To Measure a Grille Before You Buy Duct Opening Size: actual front end outer dimensions are 7" width X 7" height