12"W X 6"H [Duct Opening] Linear Aluminum Clip-On Bar Return Air Grille [Outer Dimensions: 12.25"W x 7.25"H] 7in diameter 875" width X 27 Compatible With Duct 7in Applications This sheet metal DDAG-A-1212

875" width X 27

+ Product Details Size – Duct end cap is 20" X 6" | 26-gauge galvanized steel end cap

+ Product Details Size – 6"h X 12"h is the size for the duct opening measurement only

+ Product Details Perfect Fit & Easy Sizing - Designed for a 26" x 12" OR 12" x 26" duct opening (measured at the opening)

Dimensions are interchangeable for rectangular filters

12"W X 6"H [Duct Opening] Linear Aluminum Clip On Bar Return Air Grille [Outer Dimensions: 12.25"W x 7.25"H] 7in diameter 875" width X 27 Compatible With Duct 7in Applications This sheet metal DDAG A 1212 875" width X 27 + Product Details Size – Duct end cap is 20" X 6" 26 gauge galvanized steel end cap