Simple installation of all-metal WonderPanaGo filter adapter onto GoPro case All-metal adapter screws on for a solid mount, your case remains water tight! Adapter does not interfere with normal function of the camera or the case Premium glass filters screw on for a solid fit Fotodiox Pro WonderPana Go H3+ Underwater Kit with Two Water Correction Filters and Lens Cap - (Pink and Purple)GoTough Filter Adapter System for the GoPro HERO3+ Underwater Housing Case