10" X 10" Steel Access Panel Removable Door For Wall / Ceiling Application (Lock and Key) With Frame - [Outer Dimensions: 11" Width X 11" Height] Blade and keep the cold air

and keep the cold air out during the Winter Months

+ Product Details Size - 12"w X 16"h is the size for the duct opening measurement only

Equipped with a locking eight-tumbler key system

+ Product Details Size - 20"w X 12"h is the size for the duct opening measurement only

and the second number represents the height

10" X 10" Steel Access Panel Removable Door For Wall / Ceiling Application (Lock and Key) With Frame - [Outer Dimensions: 11" Width X 11" Height] Blade and keep the cold air+ Product Details Size 10"w X 10"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 11" width X 11" height Installation Easy installation just screw the sides of the access panel frame into your duct hole see photos for example. Our HVAC Access Door can be used in both commercial and residential settings. Design Easy access removable door provides easy access removable door for HVAC, plumbing,