For dryers, bathroom vents, and range hoods. Tough UV-resistant 4" plastic vent with 4" x 12" aluminum tube. Exclusive dual door design keeps pests out, minimizes drafts and wind clap, keeps lint from collecting around vent, and saves energy by allowing better air flow. Attractive low profile design. Pre-assembled. No 8 stainless steel screws recommended (not included) for installation. Faceplate is 5-1/4" W. x 6-1/16" H. with angled corners. Complies with 2009 International Mechanical Code (Section 504). Recyclable.