Polar Pro Snorkel Filter engineered specifically for GoPro Hero 5 / Hero 6 Black / Hero 7. Corrects underwater video and images up to 8 metres (25 feet) deep. Captures vibrant tropical colours without the need of editing. Secure, push-on design ensures quick installation and removal. Low-profile design. The filter uses a special colour formula to colour correct underwater, guaranteed to make your videos pop.

Originally purchased for €50, will sell for €25. Never used!