Features1. Non corrosive housing, long lasting, dustproof, shockproof, waterproof. Ensures durability for long-term use.2. These LEDs draw less current, generate less heat and are brighter and light faster than an incandescent bulbs.3. IP65 waterproof LED trailer lights, effectively withstand the invasion and corrosion of sand, dust, dirt, rain, snow, etc.4. 4 inch Round Chrome Rings with 24pcs LEDs, easy to install to different types of 12V vehicles.5 1/3 inch Diameter round Waterproof trailer light 24 LED serves 3 functions as stop light, turn signal light and tail light; Mounts on trailer with built-in flange;Compatible with almost All automobiles and devices equipped with a 8-16 Volt DC power source such as Semi Truck, Semi Trailer, Service Truck, Bus, Service Van, Utility Truck, Enclosed Trailer, Utility Trailer, Boat Trailer, Parade Float, Horse Trailer, Utility Trailer, Pick Up Truck, UTE, UTV Peterbilt, freightliner, international ,Kenworth, mack and lorries etc.Wiring Tips:Gray -- GroundGreen -- Low Brightness for Tail and Running LightRed -- High brightness for stop light / brake light / turn lightSpecificationWorking Voltage: DC 12VWaterproof Rate: IP65Shape: RoundNumber of LED: 24Color: RedMaterial: ABSOuter Diameter: 5 1/3 inch (13.5cm)Inner Diameter: 4 inchHole-to-hole distance: 4 1/3 inch (11CM)Package Contents:4 * brake lightsOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.