6" X 6" Sound Rated Steel Access Panel Felt Covered Door For Concealed Wall / Ceiling Application With Slotted Lock - [Outer Dimensions: 7" Width X 7" Height] w36h36 Actual Filter Size – 23

Actual Filter Size – 23 3/4"w x 33 3/4" x 1"

Its heavier gauge construction guarantees durability and longevity

diagonally feed it through the square hole

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+ Product Details Size - 36"w X 24"h is the size for the duct opening measurement only

6" X 6" Sound Rated Steel Access Panel Felt Covered Door For Concealed Wall / Ceiling Application With Slotted Lock - [Outer Dimensions: 7" Width X 7" Height] w36h36 Actual Filter Size – 23+ Product Details Size 6" X 6" is the size for the drywall opening measurement only, actual front end outer dimensions are 7" Width X 7" 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.