6"W X 6"H [Duct Opening] Aluminum Double Deflection Adjustable Air Supply HVAC Diffuser - [Outer Dimensions: 7.6"W X 7.6"H] w18h18 Actual Filter Size – 13

Actual Filter Size – 13 3/4"w x 33 3/4" x 1"

With a solid base for stability

the second number represents the height

Actual Filter Size – 19 3/4"w x 29 3/4" x 1"

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

6"W X 6"H [Duct Opening] Aluminum Double Deflection Adjustable Air Supply HVAC Diffuser - [Outer Dimensions: 7.6"W X 7.6"H] w18h18 Actual Filter Size – 13+ Product Details Size 6"w X 6"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 7. 6" width X 7. 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,