If there is a quite special need of super accurate cross line aligning with long line length, it is just the best chance for users to make good use of Berlinlasers green cross laser alignment. It is an advanced cross line measuring tool, owing to its good use of glass coated lens with different optic lens degree of 10, 15 and 110 degree, this green laser module is just workable with different cross line length and high linear quality two perpendicular green lines generation in distance. Under condition that green laser module is selected with large optic lens degree of 110 degree, it is just able to get the longest line length of 6 meters cross line source at about 2 meters distance.

This green cross laser alignment is a nice accessory part of those of industrial device, which is able to be installed on industrial device, such as heat transfer machine, laser alignment for screen printing system, laser medical treatment device, and others. Owing to its special electric wire design, this green laser module is allowing free installation and adjustment within 0.3 meter to 3 meters, and then achieving high level of accuracy cross line alignment conveniently.
http://www.berlinlasers.com/532nm-green-cross-projecting-laser-alignment