The light balancing kit contains four color temperature correction filters - 81a, 81d, 82a, 82c. Color temperature correction filters provide a range of warming and cooling effects and are used for exposing tungsten materials in daylight or vice versa. They increase or decrease color temperature thereby producing respectively a cooling or warming effect. This 100mm filter kit is usable with Formatt Hitech 100mm holder systems or any 100mm holder. The kit is also available in 85mm, 150mm and 165mm sizes. Formatt Hitech filters are made from the highest quality 1.5mm optical resin.