The 118SW is a 18 in. baseboard supply air diffuser used for baseboard openings. This diffuser returns air to your home and offers a subtle baseboard design. One simple pull of the latch and the single damper will close quietly and smoothly. Our product is constructed to ensure maximum airflow and compliment your home decor. Using our product to outfit your ventilation system will improve your home air circulation. Product features: Steel construction, sunburst blade pattern, SmoothGlide, pristine white powder coat finish.Allows air to flow freely between your ventilation system and a roomMade of high quality steelWhite powder coat finishEasy opening tab face