Smooth Surface Plastic Latch Rear Snap Waterproof Housing Case Snap Lock Buckle Replacement for Gopro HD Hero 4/3+ Housing Skeleton - Black High Quality Plastic latch Compatible with GoPro HD Hero 3+ / 4 cameras Original waterproof housing case and side open case. Updated 304 steel Lock Buckle avoid Corrosion from sea water and the air . Sturdy lock structure Allows the rear door to shut tight, No leak .Freely using in underwater circumstance. Outstanding Smooth surface design ,simple structure and light weight. 6 months worry-free product guarantee.