20" x 30" or 30" x 20" Cube Core Eggcrate Return Air Grille Color_Black With HVAC Premium you get

With HVAC Premium you get an extra measure of quality that will be visible to your family members and house guests

Actual Filter Size – 7 3/4"w x 33 3/4" x 1"

For 14" Round Duct Opening - Spiral or Flex

Actual Front End Outer Dimensions Are 12" Width X 4" Height - SEE IN DESCRIPTION HOW TO MEASURE A GRILLE

actual front end outer dimensions are approximately 8

20" x 30" or 30" x 20" Cube Core Eggcrate Return Air Grille Color_Black With HVAC Premium you get+ Product Details Size 20" x 30" or 30" x 20" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 21. 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