12" X 12" Steel Access Panel Removable Door For Concealed Wall / Ceiling Application With Slotted Lock - [Outer Dimensions: 13" Width X 13" Height] w28h28 + Product Details Size -

+ Product Details Size - 25"w X 20"h is the size for the duct opening measurement only

Actual dimensions: 13

+ Product Details Size - 26"w X 6"h X 2"d (for duct opening measurement only)

10" X 4" Is The Size For The Duct Opening (floor/vent hole) Measurement Only

then you'll need a 14-inch round vent

12" X 12" Steel Access Panel Removable Door For Concealed Wall / Ceiling Application With Slotted Lock - [Outer Dimensions: 13" Width X 13" Height] w28h28 + Product Details Size -+ Product Details Size 12"w X 12"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 13" width X 13" height Installation Easy installation Small bendable ears for flexible installation just screw the sides of the access panel frame into your duct hole. Our HVAC Access Door can be used in both commercial and residential settings. Design Easy access removable door provides easy access removable door