8" Round Air Vent Supply Grille With Sponge Gasket And Mounting Frame - HVAC Vent Duct Register Cover [Outer Dimensions: 10"] w8h8 + Product Details Size - Compatible With Duct 7in Applications This sheet metal DDAG-A-1212

+ Product Details Size - 12"w X 18"h X 2"d (for duct opening measurement only)

+ Product Details Size - 12"w X 34"h is the size for the duct opening measurement only

Ring Base Design – Allows for easy installation without removing the thermostat

+ Product Details Size - 14"w X 16"h is the size for the duct opening measurement only

+ Product Details Size – 24" x 24" with 14" collar T-Bar drop ceiling perforated return grill - metal back casing

8" Round Air Vent Supply Grille With Sponge Gasket And Mounting Frame HVAC Vent Duct Register Cover [Outer Dimensions: 10"] w8h8 + Product Details Size Compatible With Duct 7in Applications This sheet metal DDAG A 1212 + Product Details Size 12"w X 18"h X 2"d (for duct opening measurement only) + Product Details Size 12"w X 34"h is the size for the duct opening measurement only