For dryers, bathroom vents, and range hoods. J-block nail flange included for use in new construction (can be discarded or recycled if application is not for new construction). Vent cap wide-mount faceplate is 6-3/4" W. x 7-3/8" H. and ideal when needing to cover a larger mounting area, either with new construction or replacement of existing vent cap. Exclusive dual door design keeps pests out, minimizes drafts and wind clap. Better airflow saves energy, and clothes dry faster. No screen to clog with lint. No flaps to break or clog. Tough UV-resistant plastic. Attractive low profile design. Includes 4" plastic vent cap and 4" x 12" aluminum tube. No. 8 stainless steel screws recommended (not included) for installation. Complies with 2009 International Mechanical Code (Section 504). Recyclable.