After the use of an intense beam 445nm blue laser diode module, being made with qualified glass coated lens and metal heat sink cooling system, it is working well with high quality blue laser light emission, and highly clear blue dot projection at long work distance. It is applying a qualified glass coated lens, equipping with a glass window, it is working well under moisture or dust as well. This direct diode emission made blue dot laser enables correct use of output power and easy adjustment of both laser beam focus and blue dot projecting direction within three dimensions. Within freely installed distance of 3 meters, this 16mm diameter tube made blue dot laser makes sure of easy installation, good direction and high stability dot alignment for both industrial and high tech precise dot measuring work fields constantly.https://www.berlinlasers.com/445nm-blue-laser-diode-module