8" x 30" or 30" x 8" Cube Core Eggcrate Return Air Grille Color_Red Oak Wood It has an outer surface

It has an outer surface made of high-quality aluminum foil and an inner surface made of metalized PET with inside high-tensile spring steel wire

these pipes offer easy handling

Actual Front End Outer Dimensions Are 12" Width X 6" Height - SEE IN DESCRIPTION HOW TO MEASURE A GRILLE

1-1/8” - 2334 PSI

listed size +1

8" x 30" or 30" x 8" Cube Core Eggcrate Return Air Grille Color_Red Oak Wood It has an outer surface+ Product Details Size 8" x 30" or 30" x 8" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 9. 75" X 31. 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