Darkhorse 58mm Circular Polarizing CPL Lens Filter Set for Gopro Hero 4 Session Compatible with Gopro hero 4 session using a 58mm lens. With a screwdriver and 58mm adapter ring CPL Filter provide color and contrast enhancement. It removes glare from non-metallic surfaces, such as windows and water. The Diving Protective Skeleton Housing Case is as the Gift to send together to you! Package includes: 58mm Circular Polarizing CPL Lens Filter Set & Diving Protective Skeleton Housing Case.