Features 1. Brand: TMC Sport Gear 2. Circular filter is made of aluminum alloy, CNC machining, anodizing, abrasion resistance, can be soaked in seawater. 3. Conveniently between using filters or not converted to use. 4. No need to worry the storage. 5. This filter adapter ring can be opened and closed. 6. Fit for Gopro HD Hero 4 / 3+
