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] Width_20in + Product Details Size –

+ Product Details Size – 10" x 18" or 18" x 10" is the size for the duct opening measurement only

and the Tank Cover is also made of High Quality Flame Retardant Metal

100% Satisfaction Guaranteed Don't worry

actual front end outer dimensions are approximately 10 5/8" width X 12 5/8" height

Looks like new after years of use

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] Width_20in + 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.