Fotodiox Pro WonderPana Go H3+ Underwater Kit with Two Water Correction (Rose-Pink & Violet-Purple) Filters and Lens Cap - GoTough Filter Adapter System for the GoPro HERO3+ and HERO4 Underwater Housing Case 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 24 Month Manufacturer Warranty