Waterproof XPERIA Z Bike Bicycle Head Stem Mount (sku 16752) Bicycle Head Stem Mount with IPX4 waterproof standard light-weight case for the Xperia Z smartphone. Fits: 1 1/8" Star Washer bike stems. A complete cycle mounting option to hold the Xperia Z mobile smartphone. The Mount: Strong secure mounting base. Machined from solid billet aluminium. British made. Fits 1 1/8" Star Washer Stems only - not suitable for Quill Stems. Fitting - Tighten to manufactures torque setting. The Case: Light-weight. Soft tough lining. Zip access. IPX4 weather resistant - will protect from light rain showers & water splashes. Touch sensitive screen lens. Detachable lanyard. Incorporates the Ultimate Addons 3 prong attachment system. What's included? 1 x 1 1/8" head stem mount 1 x 3 prong adaptor 1 x soft case. Important - when fitting the case to the mount always ensure the adaptor clicks fully in position before inserting your phone.