This Firecrest Di Fruscia 100mm Signature Edition Pro Essentials Kit from Formatt Hitech contains two filters that can be used individually or in combination to improve the results of your photography by preventing overexposure, as well as a circular polarizer to prevent distracting reflections or glare. The included filters consist of an 82mm Firecrest circular polarizer, a 100 x 100mm Firecrest solid neutral density filter that reduces the amount of light entering a lens by four stops, and a 100 x 150mm Firecrest three-stop graduated neutral density filter that features a soft-edged line of transition between its dense and clear areas. Together, these neutral density filters provide a versatile solution for various lighting conditions and horizon lines.