36" X 36" Steel Return Air Filter Grille for 1" Filter - Fixed Hinged - [Outer Dimensions: 38 5/8" X 38 5/8"] 12" Round Duct Pipe + Product Details Size -

+ Product Details Size - 28"w X 36"h is the size for the duct opening measurement only

+ Product Details Size – Duct end cap is 14" X 12" | 26-gauge galvanized steel end cap

+ Product Details Size - 16"w X 22"h is the size for the duct opening measurement only

Design – Individually adjusting curved blades for better air flow control

Actual Front End Outer Dimensions Are 12" Width X 4" Height - SEE IN DESCRIPTION HOW TO MEASURE A GRILLE

36" X 36" Steel Return Air Filter Grille for 1" Filter - Fixed Hinged - [Outer Dimensions: 38 5/8" X 38 5/8"] 12" Round Duct Pipe + Product Details Size -+ Product Details Size 36"w X 36"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 38 5 8" width X 38 5 8" height High Quality High quality solid stamped steel with counter sunk screw holes (screws included) and no sharp edges Installation Location Ceiling Design Fixewd hinged for easy filter change & cleaning uses a 1" thick filter. Our filter grille latch is easy to use on your fingers and