6 Volt positive ground or negative ground vehicles. Dual filament. There are 60 5730 SMD LED's. The base is 15mm diameter and has offset bayonets. There are two contacts on the bottom one for taillight and one for brake light. Up to 900 Lumen output for brake light or 71 CP candle power. The taillight has up to 700 Lumens output or 55 CP candle power. Works from 3.4 volts to a maximum of 8 volts. Available in White 6000K, Warm White 3000K, Red and Yellow/Amber. If the color is not listed then we are out of stock of that color and takes about 4 to 8 weeks to restock that color. Long life up to 30,000 hours. Comparable up to a 30 to 40 Watt incandescent bulb. The light bulb is dimmable by changing the voltage from 3.4 to 6 volts. The White 6000K uses about 495 mA at 6.02 volts, the Warm White uses about 495 mA at 6.02 volts, the Red uses about 405 mA at 6.02 volts and the Yellow/Amber uses about 415 mA at 6.02 volts. Maximum overall length is 1.694". The maximum diameter is 1.058". These  bulbs are designed for taillights and brake lights, ie a dual filament bulb. Please make sure your vehicle or motorcycle is regulated to approximately 6 volts. These LED bulbs do not have built in load equalizers and may require load equalizers to be installed to operate correctly. Every bulb is tested before shipping. Includes 2 bulbs per package. 1 year warranty from date of purchase. CE and Rohs.