About This PRECISE FIT FOR 4 INCH DUCT - INSERTION DIAMETER is 3.94" and EXTERNAL DIAMETER is 4.92" with INSERTION DEPTH of 0.79" inches. For residential or commercial use. Suitable for use as a gable vent, crawlspace vent, house foundation vent or soffit. HEAVY DUTY AIR VENT COVER - Duct soffit vents are manufactured from quality metal - aluminum. Made for indoor and outdoor use. Aluminum is resistant against harsh weather, physical scratches and dents. CLEAN AIRFLOW, ZERO BLOCKAGE - Protect your ventilation system from outside environment with built-in aluminum mesh screen. Protection mesh pane guard dimensions - 0.39" x 0.39" Inches. This air duct vent cover has modern design and is suitable for a 4 inch vent. SIMPLE INSTALLATION - The industrial round vent cover must be fixed to a flat surface with screws. Screw holes are located at the sides of the mounting neck, between the louvers and aluminum mesh. Screws are NOT included. INTERIOR & EXTERIOR HOME IMPROVEMENT - Wall vent covers for HVAC - ventilation, heating, cooling. Round air vent cover for house - kitchen, bathroom, kitchen, garage, shed or attic. As a ceiling vent, bathroom vent cover, outdoor dryer vent cover, conditioner vent / ac vent or as a soffit vent cover.
