4" X 12" Modern Victorian Floor Register Grille With Dampers - Decorative Grate - HVAC Vent Duct Cover - Matte Black d Crafted from high-quality aluminum MFFG810-1 Product Details Size 20 Compatible with Duct 3"

Crafted from high-quality aluminum

Actual Filter Size – 33 3/4"w x 13 3/4" x 1"

} + Product Details Size & Compatibility - The size of a boot register end is 6" X 4" X 5" galvanized floor boot end center 26-gauge

} + Product Details Size & Compatibility - The size of a boot register end is 12" X 4" X 6" galvanized floor boot end center 26-gauge

actual front end outer dimensions are 35

4" X 12" Modern Victorian Floor Register Grille With Dampers Decorative Grate HVAC Vent Duct Cover Matte Black d Crafted from high quality aluminum MFFG810 1 Product Details Size 20 Compatible with Duct 3" Crafted from high quality aluminum Actual Filter Size – 33 3 4"w x 13 3 4" x 1"