The louvered exhaust vent is used to vent dryers and bathroom exhaust fans. The unique design includes a built in grid to prevent bird intrusion and a 10" long metal tube that can be used for extra thick walls. Design allows for open or closed flaps. Manufactured with ultraviolet stabilized color, minimizing the effects of exposure to the elements. Compatible with all siding profiles. Rich textured appearance. Surface dimensions: 7" x 7". Flange dimensions: 8 1/2" x 7 1/2". J Channel internal dimension: 3/4" adjusts to 1 1/4". Tube length: 10" tube. Diameter: 4".