The laser alignment filter Type S2811 is a gray absorbing mineral glass filter without additional coating. The protection is based on absorption of the laser light within the bulk material. The filter Type S2811 has low daylight transmission of approx. 1%, therefore additional illumination of the work place is strongly requiered. The laser alignment filter is CE certified for laser alignment purposes only and available in the ECO, PROTECTOR oder ALL STAR frame. Please calculate required protection levels before using laser safety filters and compare with the filter provided.