12" X 30" ALUMINUM RETURN FILTER GRILLE FOR 1" FILTER - EASY AIRFLOW - LINEAR BAR GRILLES Drop Ceilings / Steel Extra Strong Frame – Our Product Description Enhance your CRFG68 Victorian Floor Registers

Extra Strong Frame – Our frames are the strongest on the market

+ Product Details Size - 16"w X 25"h is the size for the duct opening measurement only

+ Product Details Size – 20"w X 14"h is the size for the duct opening measurement only

+ Product Details Size – 28"w X 24"h is the size for the duct opening measurement only

Easy Cutting – Offset and Spring Loaded design for easy

12" X 30" ALUMINUM RETURN FILTER GRILLE FOR 1" FILTER EASY AIRFLOW LINEAR BAR GRILLES Drop Ceilings Steel Extra Strong Frame – Our Product Description Enhance your CRFG68 Victorian Floor Registers Extra Strong Frame – Our frames are the strongest on the market + Product Details Size 16"w X 25"h is the size for the duct opening measurement only