Buybits Motorcycle Bike 19mm Fork Stem Yoke Mount with Waterproof Smart Phone Case (sku 10336) Protect your Mobile Smartphone from rain and damp weather while out on your motorcycle. Make the most of the map, SatNav & TomTom applications available to download. This central fork stem yoke mount has been developed for use on motorcycles where a handlebar mounting option is not possible or desirable. Designed to fit sports, superbike, endurance and touring motorbikes using the cylindrical bore wall (steering head tube) of the fork stems. Motorcycle Fork Stem Yoke Mount Fits Stems: 17.5mm-20.5mm (0.68 "- 0.81") The Waterproof Case: A high quality zip case that will keep your mobile phone protected and dry. The clear touch sensitive lens allows access to the screen of your mobile while it remains it the case. Weather resistant cable access - great if you want to power your device. This case allows room for a charging cable to be attached. Can be used with any silicon case or skin that doesn't cover the screen of the phone. Includes removable support pieces to accommodates varying phone sizes.