This is a filter used to capture vivid underwater images while diving or snorkeling. It has some minor scratches from use, but they do not affect the quality of the photos. Designed specifically for the HERO9 Black Protective Housing (fits the HERO9 Black camera only when used with the Protective Housing). Captures vibrant colors in blue, green, and shallow water. Secure slide-on design and tether for added safety. Includes red, magenta, and snorkel filters, and a hard-shell storage case. Thank you for looking.