This is a 3D Printed nylon iPhone holder with versions to fit 7 and 8 handsets. These holders have a garmin 1/4 style fitment and will work with any of the Garmin standard stem mounts or our longer outfront mount. These units are designed for indoor turbo trainer use and we dont recommend that they are used out on the open roads, however on smooth roads it should not be a problem. We also offer a mount to work with this holder and can be bought as a bundle for a reduced rate. The bundle deal can selected from the options on the drop down list and the mount will be Black and to fit standard 31.8mm diameter bars. Please note these holders are made to order and can take up to 10 days to ship.