Silicone Light Bulb Cover – Blue. Fits 1156 and 1157 Bulb Size. Large – Approximately 31mm tall, widest width ~27mm, base width ~19mm. Changes color of clear bulbs to Blue. Slips over clear bulbs, will not burn like Plastic Covers. Not all colors are legal for street use. Show use only. Can also fit on 3156 and 3157 bulbs. Sold individually.