18" x 26" or 26" x 18" Cube Core Eggcrate Return Air Grille Compatible With Duct 8in + Product Details Size - Product Details Perfect Fit Color_Anodized Aluminum AD-P-001-18x18

+ Product Details Size - 32"w X 12"h is the size for the duct opening measurement only

+ Product Details Size – 28" x 34" or 34" x 28" is the size for the duct opening measurement only

actual front end outer dimensions are approximately 28 5/8" width X 26 5/8" height

875" width X 16" height

line-height: 1

18" x 26" or 26" x 18" Cube Core Eggcrate Return Air Grille Compatible With Duct 8in + Product Details Size Product Details Perfect Fit Color_Anodized Aluminum AD P 001 18x18 + Product Details Size 32"w X 12"h is the size for the duct opening measurement only + Product Details Size – 28" x 34" or 34" x 28" is the size for the duct opening measurement only