Rectangle Milk Lens LED Aluminium Extrusion with Cover made from high-quality Aviation 6063-T5 aluminum alloy with Double-Anodized and is designed for flexible or rigid LED strips that are 14-16mm wide. One of the accessories offered for the extrusion are covers that shade and protect LEDs inside the profile. There are several cover options: Clear, Frosted, Milky. Covers are made of polycarbonate/PMMA and are certified for excellent resistance to all weather conditions and UV radiation, as well as being flame-retardant. Standard polypropylene end caps are used for the extrusion as supplementary accessories. End caps protect the extrusion from dust and other undesirable elements, which can make LED strips dirty and consequently deteriorate the lighting parameters. The extrusion can be mounted to surfaces with the mounting screws and brackets and also suspended mounted by a steel cable.