30cm x 30cm Circular polarized 3d filters

30cm x 30cm Circular polarized 3d filters, top grade glass with high transmittance and rubresistance, imported circular polarized films inside. 1) optics parameter- polarized efficiency 99.9%, transmittance >42%, compensation 125nm/138nm 2) sizes available: 15 x 15cm, 20 x 20cm, 25 x 25cm, 30 x 30 cm, we also do custom sizes according to customers' requirements 3) Useage area - Real D 3d theaters, Master Image3d cinemas, family projectors, office projectors, school projectors