... lamp(heat sink),ring,lens, upper cover,holder,PCB,screw except driver and LED sourceChina led lightsApplication:Home ,hotel,museum,office, ... (heat sink),ring,lens, upper cover,holder,PCB,screw except driver and LED sourceHeat sink: Aluminum Treatment of heat sink: ... system for the high quanlity.(5S+PDCA)4 Advanced equipment and precise measuring machine5 High quanlity but competitve pricingPicture: LED ...