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 – 14" Round Duct Pipe For 10 duct opening FR M 414 White

+ Product Details Size – 28"w X 16"h is the size for the duct opening measurement only

+ Product Details Size - 4"w X 34"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 - 36"w X 24"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 – 14" Round Duct Pipe For 10 duct opening FR M 414 White + Product Details Size – 28"w X 16"h is the size for the duct opening measurement only + Product Details Size 4"w X 34"h is the size for the duct opening measurement only