20" X 20" Sound Rated Steel Access Panel Felt Covered Door For Concealed Wall / Ceiling Application With Slotted Lock - [Outer Dimensions: 21" Width X 21" Height] Grey Ideal for Walls & Ceilings:

Ideal for Walls & Ceilings: Designed for seamless installation in standard 20" X 20" duct openings

our Round Air Vent Supply Grille is the perfect addition

+ Product Details Size – 16"w X 32"h is the size for the duct opening measurement only

Universal Fit: The adjustable design and flexible fabric adapt seamlessly to fit nearly any wrist size

20" X 20" Sound Rated Steel Access Panel Felt Covered Door For Concealed Wall / Ceiling Application With Slotted Lock - [Outer Dimensions: 21" Width X 21" Height] Grey Ideal for Walls & Ceilings:+ 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 High grade steel construction. Design 1mm galvanized steel material with sleek, shiny, durable white powder coat finish for an attractive look & high durability corrosion protection 15mm medium density fibreboard with felt cover and rubber sealing between the door and frame for tight security.