18"W X 24"H [Duct Opening] ALUMINUM RETURN GRILLE - EASY AIR FLOW - LINEAR BAR GRILLES [OUTER DIMENSIONS: 19.875"W X 25.875"H] Blade Design – removable frame for LO246 Product Details Size 32 Compatible with Duct 4"

Design – removable frame for easy filter change & cleaning - uses a 1" thick filter

+ Product Details Perfect Fit & Easy Sizing - Designed for a 34" x 16" Or 16" x 34" duct opening (measured at the opening)

75 Height - SEE IN DESCRIPTION HOW TO MEASURE A GRILLE PROPERLY

Actual Filter Size – 24 3/4"w x 13 3/4" x 1"

18"W X 24"H [Duct Opening] ALUMINUM RETURN GRILLE EASY AIR FLOW LINEAR BAR GRILLES [OUTER DIMENSIONS: 19.875"W X 25.875"H] Blade Design – removable frame for LO246 Product Details Size 32 Compatible with Duct 4" Design – removable frame for easy filter change & cleaning uses a 1" thick filter + Product Details Perfect Fit & Easy Sizing Designed for a 34" x 16" Or 16" x 34" duct opening (measured at the opening)