24" x 24" T-Bar Drop Ceiling Perforated Return Grill - Metal Back Casing - With 10 "Collar Color_Black diagonally feed it through the

diagonally feed it through the square hole

+ Product Details Size – 10"w X 16"h is the size for the duct opening measurement only

Carefully Shrink Wrapped With Cardboard Backing To Prevent Damage In Shipment

+ Product Details Size - 4"w X 28"h is the size for the duct opening measurement only

24" x 24" T-Bar Drop Ceiling Perforated Return Grill - Metal Back Casing - With 10 "Collar Color_Black diagonally feed it through the+ Product Details Size 24" x 24" with 10" 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