The 6S6/48V is a heavy-duty, low-voltage automotive bulb manufactured by Eiko. It features a 6-sided C-6 filament made of silicone-coated tungsten strands, which helps to extend the life of the bulb. The bulb has a 48-volt rating, making it suitable for most automotive applications. The bulb also features a heavy-duty aluminum base designed to secure it in place. Additionally, the bulb has a special UV-coating for superior light output and a long life.