Unique technology, ISO, Rohs certificated, Can be made from any customer specified glass. Unique TechnologyISO9001-2008, Rohs CertificatedB270 or BK7 is preferred. Any other optical glass like UV fused quartz, PYREX… is also availableSize of our products: 1.5mm or any other size.Low cost, high volume. Any quantity is welcome. Potential yield of our factory is bigger than one million pcs per month ...