Black polymer are commonly used to make your solar filters home. Can be used for sun-watching vivacity, telescopes, finders, and binoculars. We only sell Thousand Oaks Optical (too) solar filters, the leading manufacturer that has been made without solar filters for 35 years. – in view of the sun at any time, including during all phases of a solar eclipse with too much filter leaves, lens filters, glasses, or public interest. Too many exclusive high-quality features of the substrates offer superior security, sharper solar images, and a pleasant orange solar image. All products meet the requirements of the CE mark. Only too much has this and ISO certification. Unlimited safe for visual and photographic use. Transmission: 1/1,000th optical density of 1% (5). – also the products are exclusively chosen by NASA for use on board the flying space. Other professional users are: ABC, CBS, NBC BBC, CNN, Nova, the Discovery Channel, National Geographic, observatories and major universities and worldwide. Too uses the latest technology for the manufacture and development of new products. Tens of thousands of their solar filters and millions of their Solar Eclipse spectators are being used worldwide.