34" X 12" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 36 5/8" X 14 5/8"] Adjustable Return Actual Filter Size – 35 Compatible With Duct 7in Applications This sheet metal DDAG-A-1212

Actual Filter Size – 35 3/4"w x 5 3/4" x 1"

much more than required 700 PSI for R410

+ Product Details Size – 12"w X 34"h is the size for the duct opening measurement only

high-impact plastic to provide reliable and long-lasting protection for your thermostat

+ Product Details Size – 28"w X 32"h is the size for the duct opening measurement only

34" X 12" Steel Return Air Filter Grille for 1" Filter Removable Frame [Outer Dimensions: 36 5 8" X 14 5 8"] Adjustable Return Actual Filter Size – 35 Compatible With Duct 7in Applications This sheet metal DDAG A 1212 Actual Filter Size – 35 3 4"w x 5 3 4" x 1" much more than required 700 PSI for R410