The FA11047_LISA2-RS-PIN-OSL is a 9.9mm round Real Spot Lens made of optical grade PMMA (Polymethylmethacrylate) with high UV and temperature resistance (105°C/220°F) and lens holder molded of high quality black PC (polycarbonate). It is specially designed for use with for Osram oslon SSL series of LEDs. The fastening of holden to PCB with appropriate adhesive.