4" X 24" or 24" x 4" Heavy Duty Floor Grille - Fixed Blades Air Grille - Brown [Outer Dimensions: 5.75 X 25.75] sidewall R6 Fiberglass Back Plenum accepts

R6 Fiberglass Back Plenum accepts 6" to 18" Round Spin-in Collars or Start Collars (not included) - Accepts 1" disposable filter (not included) - Recommended Size: 20x20x1

+ Product Details Size – 10" x 26" or 26" x 10" is the size for the duct opening measurement only

Design – Re-configurable/Interchangeable Sections – Easily convertible into 1-Way

Actual Filter Size – 27 3/4"w x 9 3/4" x 1"

+ Why Hvac Premium Our MERV 8 pleated filter is 30 times more efficient at capturing small particles than ordinary fiberglass filters

4" X 24" or 24" x 4" Heavy Duty Floor Grille - Fixed Blades Air Grille - Brown [Outer Dimensions: 5.75 X 25.75] sidewall R6 Fiberglass Back Plenum accepts+ Product Details Size 4"w X 24"h or 24" x 4" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 5. 75" width X 25. 75" height. High Quality High grade steel construction meant for high foot traffic areas. Installation Location Floor. Design Easy drop in installation. Powder Coat Finish Smooth, shiny, scratch resistant, with no sharp edges. Looks like it was just waxed. Quality Packaging Carefully