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 + Product Spec Sheet Lay-In

+ Product Spec Sheet Lay-In 3 Coned Spec Sheet

this thermostat guard is compatible with most standard thermostat models

+ Product Details Size - 10"w X 36"h X 2"d (for duct opening measurement only)

+ Product Details Size – 8"w X 12"h is the size for the duct opening measurement only

The vent also has a bug screen to eliminate pest intrusion

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 + Product Spec Sheet Lay-In+ 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.