Complete kit with 2 sizes of fiber optic cable and light sources. Kit comes complete with 20 feet of .020" fiber optic cable, 10 feet of .030" fiber optic cable, a 5mm bright white LED (10,000mcd), a 3mm white LED (14,000mcd), a 5 mm flashing red LED, resistors for 12 volts, and instructions. Great for small street lights, walkways, police car lights etc. Can also be used with our welding circuits to put the welder into the hands of an N or HO scale mechanic. A great item to experiment with and have fun thinking up new uses. Try it you will like it.