The Helium Neon Aligment Filter is a laser safety lens made of a blue/teal polycarbonate lens. It is cut and mounted into model 66 frame. The temple bars are fully adjustable, ratcheting up and down and telescoping for a perfect fit. The large lens design ensures maximum safety and visibility.
OD>5+ from 190-380nm
OD>2+ from 633nm
VLT = 69%
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