DarkHorse 58mm Aluminum Alloy Filter Flip Up Adapter Ring for GoPro Hero 3+, Hero 3 Plus, Hero 4 Camera Standard Housing - Black The filter adapter will attach to the outer housing around the lens and with threads to screw in 58mm filters (filter is NOT included) Compatible with GoPro Hero3+ / Hero4 standard housing (the housing features no screws on the outer housing around the lens) Flip up design allows users to quickly add or remove the filter for land and water use or as color drops off with depth Made of lightweight durable aluminum alloy Package included:- Filter Adapter x 1 (GoPro camera and housing are NOT included)