Berlinlasers 635nm Red Line Laser Module with Qualified Optic Lens Anytime 635nm red line laser module is generating super high linear quality red laser line from its qualified lens in type of glass cylindrical lens, it is not only able to get various laser beam fan angle, but also generating various red laser line length from 0.5 meter to 6 meters in distance. Red laser line keeps extremely high line straightness, while users only need to select correct output power and glass lens degree, a properly installed laser line generator can easily achieve high precision laser line alignment precisely and accurately.