The protection for the outdoor housing does not fit on the up to 60m waterproof case the GoPro Hero 3 on the smaller outdoor enclosure of the Hero 3+, that is waterproof up to 40m. The other replacement covers and the lens protection again fit for both models. I find the protection quite handy to avoid leaving fingerprints or scratches on the lens when it is transported or installed. Granted, not cheap, but the original pieces fit.