Type A Specification: Type: LED Side Maker Material: PC Waterproof:IP65 Voltage: 10V - 30V LED Quantity: 2 led Suitable for : Universal Truck trailer Van Bus Tractor etc. Color: Red/White Height:50mm/1.9in Distance Between Two Bolt Hole: 37mm/1.4in Placement on vehicle : front / rear / left / right Wire connection : red wire -- positive; black wire -- negative Features: - High quality, low power consumption - Easy to install, long-lasting and durable - Reliable and safe - Fits for most Buses/Trucks/Trailers/Lorries, please make sure the size before purchasing. - These can be used for side marker lights, rear lights, etc. Note : 1.Please allow 0.5-1 inch difference due to manual measurement.(1inch=2.54cm). 2.The color of the actual items may slightly different from the listing images due to different computer screen, thanks for your understanding. 3.There is no instruction included.Professional Install is Highly Recommended!If you would like to know how to install,