36" X 20" Steel Return Air Filter Grille for 1" Filter - Fixed Hinged - [Outer Dimensions: 38 5/8" X 22 5/8"] w34h34 + Product Details Size -

+ Product Details Size - 4"w X 14"h is the size for the duct opening measurement only

R Value Rating of Insulation - R3

Pre-flared ends with nuts are for simple and easy installation

Tough reinforced metallized polyester jacket - tear and puncture resistant

actual front end outer dimensions are approximately 32 5/8" width X 20 5/8" height -

36" X 20" Steel Return Air Filter Grille for 1" Filter - Fixed Hinged - [Outer Dimensions: 38 5/8" X 22 5/8"] w34h34 + Product Details Size -+ Product Details Size 36"w X 20"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 38 5 8" width X 22 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 Fixed hinged for easy filter change & cleaning uses a 1" thick filter. Our filter grille latch is easy to use on your fingers and