Simple installation of all-metal WonderPanaGo filter adapter onto GoPro HERO3+ 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 fitFotodiox Pro WonderPana Go H3+ Standard Kit with Three Filters (UV, CPL, ND8) and Cap - GoTough Filter Adapter System for GoPro HERO3+ Skeleton Housing Case