30"W X 16"H [Duct Opening] ALUMINUM RETURN GRILLE - Easy Air Flow - Linear Bar Grilles [Outer Dimensions: 31.875"W X 17.875"H] Aluminum Adjustable Curved Blade actual front end outer dimensions Compatible with Duct 4" Product Details Size 32 LO246

actual front end outer dimensions are approximately 18 5/8" width X 34 5/8" height

actual front end outer dimensions are approximately 28 5/8" width X 14 5/8" height

+ Product Details Perfect Fit & Easy Sizing - Designed for a 6" x 16" or 16" x 6" duct opening (measured at the opening)

This grille has a high standard of design

+ Product Details Size – Size - Cuts 36mm & below

30"W X 16"H [Duct Opening] ALUMINUM RETURN GRILLE Easy Air Flow Linear Bar Grilles [Outer Dimensions: 31.875"W X 17.875"H] Aluminum Adjustable Curved Blade actual front end outer dimensions Compatible with Duct 4" Product Details Size 32 LO246 actual front end outer dimensions are approximately 18 5 8" width X 34 5 8" height actual front end outer dimensions are approximately 28 5 8" width X 14 5 8" height