8" x 6" or 6" x 8" Cube Core Eggcrate Return Air Filter Grille for 1" Filter - Aluminum - White [Outer Dimensions: 10.5" X 8.5"] 14" Round Duct Pipe Actual Filter Size – 13 10in diameter 75 Plenum Box Depth 1267FLR90

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

+ Product Details Size - 22"w X 34"h is the size for the duct opening measurement only

Energy Efficient – Air-tight inner core decreases the pressure loss and provides a more hygienic environment - high energy efficient / No fiberglass erosion into air stream

Crafted from solid stamped steel

+ Product Details Perfect Fit & Easy Sizing - Designed for a 10" x 6" or 6" x 10" duct opening (measured at the opening)

8" x 6" or 6" x 8" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Aluminum White [Outer Dimensions: 10.5" X 8.5"] 14" Round Duct Pipe Actual Filter Size – 13 10in diameter 75 Plenum Box Depth 1267FLR90 Actual Filter Size – 13 3 4"w x 13 3 4" x 1" + Product Details Size 22"w X 34"h is the size for the duct opening measurement only