8"W X 4"H [Duct Opening] Aluminum Double Deflection Adjustable Air Supply HVAC Diffuser - [Outer Dimensions: 9.6"W X 5.6"H] with filter Actual Filter Size – 29

Actual Filter Size – 29 3/4"w x 29 3/4" x 1"

+ Product Details Size - 4"w X 20"h is the size for the duct opening measurement only

you have 16 different varieties to choose from

Every grille has a front end frame that will overlap at the wall joint

actual front end outer dimensions are approximately 24 5/8" width X 28 5/8" height

8"W X 4"H [Duct Opening] Aluminum Double Deflection Adjustable Air Supply HVAC Diffuser - [Outer Dimensions: 9.6"W X 5.6"H] with filter Actual Filter Size – 29+ Product Details Size 8"w X 4"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 9. 6" width X 5. 6" height. Design Full Control Vertical Horizontal Air flow Direction. Horizontal blades in the front, Vertical blades in the back, both individually adjustable. High Quality Aluminum The premium durable aluminum will never rust and it will never wear through leaving the material with an elegant,