ALP RA Series Reflectors are made of anodized aluminum and feature a smooth rolled metal design, minimum reflectance of 86 percent and a 25 year warranty. The reflectors are corrosion and chemical resistant, fire resistant, static-free and formable. Anodized aluminum reflectors prevent light striations, offer high light output, will not yellow or burn, cannot peel, blister or delaminate, function in hostile environments, meet all codes and are easy to install. Two TEK screws.