24" X 24" Aluminum Access Panel Gypsum Board/Sheet Rock Door For Wall / Ceiling Application (PUSH-LOCK DOOR) With Frame - [Outer Dimensions: 25" Width X 25" Height] Return Grille + Product Details Size - Compatible With Duct 7in Applications This sheet metal DDAG-A-1212

+ Product Details Size - 4"w X 30"h is the size for the duct opening measurement only

actual front end outer dimensions are approximately 42 5/8" width X 12 5/8" height -

+ Product Details Size - 12"w X 36"h is the size for the duct opening measurement only

Our MERV 8 pleated filter is 30 times more efficient at capturing small particles than ordinary fiberglass filters

+ Product Details Size - 22"w X 12"h X 2"d (for duct opening measurement only)

24" X 24" Aluminum Access Panel Gypsum Board Sheet Rock Door For Wall Ceiling Application (PUSH LOCK DOOR) With Frame [Outer Dimensions: 25" Width X 25" Height] Return Grille + Product Details Size Compatible With Duct 7in Applications This sheet metal DDAG A 1212 + Product Details Size 4"w X 30"h is the size for the duct opening measurement only actual front end outer dimensions are approximately 42 5 8" width X 12 5 8" height