Lasership

http://www.lasereshop.com/green-laserpointer/p-25.html
Laser Pointer the Ultra Powerful Laser Pointer with a laser of class 3B or 4 works that can block the correct wavelength of the laser. When using ready-made 532nm (green) Class 3B or DPSS laser pointers, it is advisable to check that the beam passes through an IR filter. If you are unsure, you can check it by using an IR-sensitive camera

Do not use them my pkg got to the facility 3 days later it was said to be lost. In the building how is that possible! No one told me anything a week later trying to find pkg only to find this out. Hope whoever stole my son's Hoodie enjoys it!