Drop Ceiling HVAC Supply Grille - For T-Bar Lay-In - 3 Coned - 24" x 24" - For 14" Vent Connection - Black 6" Round Duct Pipe + Product Details Size - Suitable for all AC 8in diameter 12125SDCLNGBX

+ Product Details Size - 20"w X 25"h is the size for the duct opening measurement only

+ Product Details Size - 36"w X 24"h is the size for the duct opening measurement only

actual front end outer dimensions are approximately 27 5/8" width X 34 5/8" height -

+ Product Details Size - 4"w X 34"h is the size for the duct opening measurement only

Drop Ceiling HVAC Supply Grille For T Bar Lay In 3 Coned 24" x 24" For 14" Vent Connection Black 6" Round Duct Pipe + Product Details Size Suitable for all AC 8in diameter 12125SDCLNGBX + Product Details Size 20"w X 25"h is the size for the duct opening measurement only + Product Details Size 36"w X 24"h is the size for the duct opening measurement only