8" X 8" Sound Rated Steel Access Panel Felt Covered Door For Concealed Wall / Ceiling Application With Slotted Lock - [Outer Dimensions: 9" Width X 9" Height] 18" Round Duct Pipe + Product Details Perfect Fit

+ Product Details Perfect Fit & Easy Sizing - Designed for a 30" x 8" OR 8" x 30" duct opening (measured at the opening)

actual front end outer dimensions are approximately 20 5/8" width X 26 5/8" height

Installs Directly On Round & Oval Spiral Duct - No Frames

our access door offers high durability with superior corrosion and rust protection

+ Product Details Size – 36"w X 8"h is the size for the duct opening measurement only

8" X 8" Sound Rated Steel Access Panel Felt Covered Door For Concealed Wall / Ceiling Application With Slotted Lock - [Outer Dimensions: 9" Width X 9" Height] 18" Round Duct Pipe + Product Details Perfect Fit+ Product Details Size 8" X 8" is the size for the drywall opening measurement only, actual front end outer dimensions are 9" Width X 9" 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.