20" X 20" Steel Access Panel Removable Door For Concealed Wall / Ceiling Application With Slotted Lock - [Outer Dimensions: 21" Width X 21" Height] Compatible with Duct 8" + Product Details Size – Compatible With Duct 7in Applications This sheet metal DDAG-A-1212

+ Product Details Size – 25"w X 28"h is the size for the duct opening measurement only

these grilles offer both functionality and aesthetic appeal

+ Product Details Size - 12"w X 8"h X 2"d (for duct opening measurement only)

+ Product Details Size - 6"w X 20"h is the size for the duct opening measurement only

The ring base allows installation without removing the thermostat

20" X 20" Steel Access Panel Removable Door For Concealed Wall Ceiling Application With Slotted Lock [Outer Dimensions: 21" Width X 21" Height] Compatible with Duct 8" + Product Details Size – Compatible With Duct 7in Applications This sheet metal DDAG A 1212 + Product Details Size – 25"w X 28"h is the size for the duct opening measurement only these grilles offer both functionality and aesthetic appeal