24" x 24" T-Bar Drop Ceiling Perforated Return Grill - Metal Back Casing - With 6" Collar sidewall actual front end outer dimensions

actual front end outer dimensions are approximately 12 5/8" width X 18 5/8" height

These are built heavy duty for installation into brick and cement walls

+ Product Details Size - 8"w X 16"h is the size for the duct opening measurement only

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24" x 24" T-Bar Drop Ceiling Perforated Return Grill - Metal Back Casing - With 6" Collar sidewall actual front end outer dimensions+ Product Details Size 24" x 24" with 6" collar T Bar drop ceiling perforated return grill metal back casing High Quality High quality rust free, strong aluminum construction with smooth finished edges for easy and safe use; Filter grille features a user friendly plastic latch that requires no screwdriver for opening. Installation Easy drop ceiling installation. Design Heavier gauge than needed, built for durability and long life in mind, but still