20" X 20" Aluminum Access Panel Gypsum Board/Sheet Rock Door For Wall / Ceiling Application (PUSH-LOCK DOOR) With Frame - [Outer Dimensions: 21" Width X 21" Height] Compatible With Duct 12in Check Out This Asin For

Check Out This Asin For Matching T-Bar Drop-Ceiling Grille: B007CNEJZK

Experience enhanced indoor comfort with our 6" Butterfly Damper

actual front end outer dimensions are approximately 18 5/8" width X 30 5/8" height

Filter Size - 15

+ Product Details Size – 8"w X 20"h is the size for the duct opening measurement only

20" X 20" Aluminum Access Panel Gypsum Board/Sheet Rock Door For Wall / Ceiling Application (PUSH-LOCK DOOR) With Frame - [Outer Dimensions: 21" Width X 21" Height] Compatible With Duct 12in Check Out This Asin For+ Product Details Size 20" X 20" is the size for the drywall opening measurement only, actual front end outer dimensions are 21" width X 21" 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