This is a complete kit needed to assemble a 650nm 200mw laser module as a project kit. You get the following: 1 - AixiZ module case including ring, acrylic lens, spring, diode mount and end case 1 - 650nm 300W compatible driver board 1 - AR coated specialty glass AixiZ lens for 650nm laser diodes 1 - Mitsubishi 200-300mw laser diode Buy now and have fun!