16" x 20" or 20" x 16" Cube Core Eggcrate Return Air Grille w12h12 + Product Details Size –

+ Product Details Size – 10" x 14" or 14" x 10" is the size for the duct opening measurement only

+ Product Details Size - 24"w X 30"h is the size for the duct opening measurement only

All of these grills have dampers

Looks Like It Was Just Waxed

modern Victorian

16" x 20" or 20" x 16" Cube Core Eggcrate Return Air Grille w12h12 + Product Details Size –+ Product Details Size 16" x 20" or 20" x 16" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 17. 75" X 21. 75". High Quality High quality, rust free aluminum construction with smooth finished edges and counter sunk screw holes (screws included); no sharp edges.. Installation Location sidewall and ceiling. Design Cubic core eggcrate design Offers highest airflow efficiency at almost 95%, reducing