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] Grille + Product Details Size –

+ Product Details Size – 16"w X 36"h is the size for the duct opening measurement only

+ Product Details Size – 14"w X 6"h is the size for the duct opening measurement only

These are specially sized to fit into all drop ceiling's

The total outer size of this grille is the listed size plus 2 and 5/8"

+ Product Details Perfect Fit & Easy Sizing - Designed for a 14" x 22" OR 22" X 14" duct opening (measured at the opening)

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] Grille + Product Details Size –+ 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.