NG-4 Polished Optical Filter Glass
Schott Filter Glass NG-4 Neutral Density Filter. Schott Glass filters come standard 6.5″ X 6.5.” However, we can grind, polish and cut to any specifications you may require. We stock the glass in an unpolished form, so we can also supply whatever thickness that you require. We offer volume discounts as long as pieces are being made to the same thickness. Please fill out the Request for quote and a sales representative will get back to you right away.