Discover the new Shapeheart accessory that means that you can fully customize the position of your smartphone on your handlebars. The Booster is compatible with both the PRO versions of the Shapeheart mounts & the STEM versions (see compatibility list below). Product details 360° swivel Length: 6.3 cm Compatible with the PRO versions of the Shapeheart mounts as well as the stem mounts Nylstop nuts to prevent loosening due to vibrations Compatibility PRO motorcycle phone holder PRO bike phone mount Bracket for bicycle fork tube (STEM) Holder for motorcycle handlebar half (STEM)