As the number one brand in towing electrical products, Hopkins Towing Solutions has provided consumers with innovation, durability, and performance for over twenty years. Hopkins Towing Solutions offers a variety of towing solutions including vehicle wiring kits, adapters, vehicle and trailer connectors, breakaway systems and much more. Today, more than 40 percent of retail category sales are generated from Hopkins innovations alone. This LED Test 4 wire flat trailer side with a 24-inch (two foot) length is designed primarily for small utility trailers. LED lights illuminate when the trailer is connected to the two vehicle, verifying that all functions are working properly and saving time during set-up and diagnosis. The connector also has protruding wings to help with disconnecting.