Kase CPL II filters are a type of circular polarizing filter designed for use with camera lenses. They are an upgraded version of the original Kase CPL filters and are made with Schott B270 Glasses and Aviation Grade Aluminium to provide better optical performance. Kase CPL II filters feature a multi-coating system that helps to reduce reflections and improve color accuracy, resulting in more vibrant and natural-looking images. Additionally, Kase CPL II filters are made with high-quality glass that is durable and scratch-resistant, ensuring that they can withstand the rigors of outdoor photography. They are available in a variety of sizes to fit different camera lenses and come with a protective case for safe storage and transport. Overall, Kase CPL II filters are a popular choice among photographers who are looking for high-quality filters to enhance the quality of their images.