24" X 24" Aluminum Insulated Fire Resistant Access Panel Door For Wall / Ceiling Application (Lock and Key) With Frame - [Outer Dimensions: 25" Width X 25" Height] 12" Round Duct Pipe All of these grills have

All of these grills have dampers

Upgrade your air distribution strategy today – invest in the efficiency and convenience of the 6" Butterfly Damper

Achieve superior control over your indoor airflow for a more comfortable space

+ Product Details Perfect Fit & Easy Sizing - Designed for a 14" x 14" duct opening (measured at the opening)

4" X 14" Is The Size For The Duct Opening (floor/vent hole) Measurement Only

24" X 24" Aluminum Insulated Fire Resistant Access Panel Door For Wall / Ceiling Application (Lock and Key) With Frame - [Outer Dimensions: 25" Width X 25" Height] 12" Round Duct Pipe All of these grills have+ Product Details Size 24" X 24" is the size for the drywall opening measurement only, actual front end outer dimensions are 25" width X 25" height High Quality Strong and sturdy aluminum built to last. Design Aluminum material & color to give your space an attractive look & provide high durability corrosion protection no rust. Built in tumbler lock and key is provided Easy Access Provides easy access for HVAC, plumbing, electrical, crawlspace etc.