JDM ASTAR Extremely Bright PX Chipsets White/Yellow 3157 3155 3457 4157 Switchback LED Bulbs For Turn Signal Lights (Set of 2 bulbs) 28-pieces high power PX-chipsets .Buy with confidence! We offer "ONE YEAR" warranty on item(s) damaged during delivery or have a confirmed manufacturer defect. These will only work for dual function lights that have both the parking/city light and turn signal function in one bulb. The 50w 6ohm load resistor or flasher relay is needed to prevent the hyper flash. Fits: 3157 3157A 3057 3155 3157NA 3357 3457 3457A 4057 4114 4157 etc.Dimension (inches): 0.70 in diameter, 2.50 in length Pls Search "JDM ASTAR PX" on YouTube to watch the amazing Extremely Bright LED bulbs Compatible for both standard and ck socket .