ALP RM Miro Aluminum Series Reflectors are made of highly polished aluminum and feature a smooth rolled metal design, minimum reflectance of 95 percent and a 25 year warranty. The reflectors are corrosion resistant and formable. The smooth, unblemished surface of the Miro aluminum reflectors prevents light striations, acheives maximum efficiency from light fixtures, functions in hostile environments, and can be shaped for ultimate light control. With 4 TEK screws.