... filters, top grade glass with high transmittance and rubresistance 30cm x 30cm Circular polarized 3d filters, top grade glass with high ... >42%, compensation 125nm/138nm2) sizes available: 15 x 15cm, 20 x 20cm, 25 x 25cm, 30 x 30 cm, we also do custom sizes ... Image 3d cinemas, family projectors, office projectors, school projectors 30cm x 30cm Circular polarized 3d filters