The 118SWP is an 18 in. Baseboard supply air diffuser used for baseboard openings. This diffuser 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 complement your home decor. Using our product to outfit your ventilation system will improve your home air circulation. This item is powder coated white and made of high quality plastic. Air deflection: 3-way. Color: White. Color Family: Whites.