Round to Oval Straight Boot - 8" Straight Transitioning Duct Boot is Compatible with Duct 8" Material_Anodized Aluminum + Product Details Size - Compatible With Duct 7in Applications This sheet metal DDAG-A-1212

+ Product Details Size - 26"w X 22"h is the size for the duct opening measurement only

please note that the total outer dimensions of the grille measure 16" in diameter

+ Product Details Size – 18" x 24" or 24" x 18" is the size for the duct opening measurement only

+ Product Details Size - 25"w X 34"h is the size for the duct opening measurement only

+ Product Details Perfect Fit & Easy Sizing - Designed for a 14" x 6" or 6" x 14" duct opening (measured at the opening)

Round to Oval Straight Boot 8" Straight Transitioning Duct Boot is Compatible with Duct 8" Material_Anodized Aluminum + Product Details Size Compatible With Duct 7in Applications This sheet metal DDAG A 1212 + Product Details Size 26"w X 22"h is the size for the duct opening measurement only please note that the total outer dimensions of the grille measure 16" in diameter