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 compatible with duct 4" |

compatible with duct 4" | 5 in a pack - 4 inch diameter pipe – 10 foot length when connected – 30 gauge thick & made of thick & durable galvanized sheet metal

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

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

and squirrels

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 compatible with duct 4" |+ 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.