12" X 12" Aluminum Access Panel Gypsum Board/Sheet Rock Door For Wall / Ceiling Application (PUSH-LOCK DOOR) With Frame - [Outer Dimensions: 13" Width X 13" Height] Color_Gray + Product Details Perfect Fit

+ Product Details Perfect Fit & Easy Sizing - Designed for a 36" x 36" duct opening (measured at the opening)

while the included installation screws make setup quick and hassle-free

actual front end outer dimensions are approximately 20 5/8" width X 12 5/8" height

10" x 2" Decorative Wood Air Vent HVAC Duct Cover Grille - Polished Finish Red Oak Wood - 2-Way Air Direction

actual front end outer dimensions are approximately 34 5/8" width X 38 5/8" height

12" X 12" Aluminum Access Panel Gypsum Board/Sheet Rock Door For Wall / Ceiling Application (PUSH-LOCK DOOR) With Frame - [Outer Dimensions: 13" Width X 13" Height] Color_Gray + Product Details Perfect Fit+ Product Details Size 12" X 12" is the size for the drywall opening measurement only, actual front end outer dimensions are 13" width X 13" height High Quality Strong and sturdy aluminum built to last and never rusts. Made with gypsum sheetrock for a seamless finish Design Aluminum frame material with sleek, shiny, durable white powder coat finish for an attractive look & moisture resistant to prevent mold & mildew buildup in indoor or outdoor