16" X 24" Steel Return Air Filter Grille for 1" Filter - Fixed Hinged - [Outer Dimensions: 18 5/8" X 26 5/8"] Adjustable Return Actual Filter Size – 13 Compatible With Duct 7in Applications This sheet metal DDAG-A-1212

Actual Filter Size – 13 3/4"w x 13 3/4" x 1"

this flex duct decreases the pressure loss and provides a more hygienic environment

Operating from -40°F to +248°F

+ Product Details Size – 4"w X 12"h is the size for the duct opening measurement only

+ Product Details Size - 4"w X 22"h is the size for the duct opening measurement only

16" X 24" Steel Return Air Filter Grille for 1" Filter Fixed Hinged [Outer Dimensions: 18 5 8" X 26 5 8"] Adjustable Return Actual Filter Size – 13 Compatible With Duct 7in Applications This sheet metal DDAG A 1212 Actual Filter Size – 13 3 4"w x 13 3 4" x 1" this flex duct decreases the pressure loss and provides a more hygienic environment