Black T-Bar Drop Ceiling Grille - Flat Plate Plaque Diffuser - 24" x 24" - 12" Collar Compatible With Duct 6in + Product Details Size & 4 X 12 Is CRFG2028 Width_14in

+ Product Details Size & Compatibilty - The 12" to 8" round metal pipe reducer & increaser 30 gauge is compatible with duct 12" to 8"

reducing electric bills and extending HVAC machine lifespan

+ Product Details Size – 10" x 26" or 26" x 10" is the size for the duct opening measurement only

+ Product Details Perfect Fit & Easy Sizing - Designed for a 8" x 10" or 10" x 8" duct opening (measured at the opening)

rain or snow

Black T Bar Drop Ceiling Grille Flat Plate Plaque Diffuser 24" x 24" 12" Collar Compatible With Duct 6in + Product Details Size & 4 X 12 Is CRFG2028 Width_14in + Product Details Size & Compatibilty The 12" to 8" round metal pipe reducer & increaser 30 gauge is compatible with duct 12" to 8" reducing electric bills and extending HVAC machine lifespan