diameter 5mm round led 1. China origin 2. fast delivery 3 no quatily problem ... material, Aluminium Base, Cooper Base, high frequency material ,Thick copper foil, 94-V0(HB), PI Material, High TG:SL S1000-2 ... to a wide range of High-tech industries such as: LED, telecommunication, computer application, lighting, game machine, industrial control, power, automobile ...