The KLUS PDS4-K double Anodized Aluminum channel is designed to flush mount 8-10mm wide LED strip lights into wood, drywall, stone, metal, or any other routable material. The extra frosted indoor cover provides a clean line of light when used with a densely spaced SMD LED strip light with at least 3 LEDs per inch. Outdoor Covers can achieve an IP67 rating when sealed properly using a silicon adhesive and are recommended in any outdoor or UV exposed environment. Change the beam angle of the LED Strip to 10° using the focus lens for a more condensed light beam or wall wash.