18" x 32" or 32" x 18" Cube Core Eggcrate Return Air Grille 12" Round Duct Pipe Its locking eight-tumbler mechanism and

Its locking eight-tumbler mechanism and supplied key safeguard your thermostat from tampering

actual front end outer dimensions are approximately 27 5/8" width X 34 5/8" height

+ Product Details Size – 20"w X 8"h is the size for the duct opening measurement only

where form meets function flawlessly

These are specially sized to fit into all drop ceilings

18" x 32" or 32" x 18" Cube Core Eggcrate Return Air Grille 12" Round Duct Pipe Its locking eight-tumbler mechanism and+ Product Details Size 18" x 32" or 32" x 18" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 19. 75" X 33. 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