Ultimate Addons Motorcycle Mirror Mount - 3 Prong Attachment (sku 14952) Motorscooter, Moped, Motorcycle Bike Crossbar Mirror attachment for the Ultimate Addons range with a 3 prong adapror for Addons cases & holders. Fits any bar with a diameters between 8mm - 16mm Attaches to morror stem giving a secure central base to view your smartphone, mobile or GPS system. The 1" / 25mm ball head is compatible with RAM motorcycle mounts & SW-Motech bike mounts. Use this mirror mount in conjunction with an Ultimate Addons cradle, holder or waterproof case to create a complete mount or add to your own mount combination to create a mounting option to suit your needs. What do I get? 1 x Ultimate Addons Mirror Mount 1 x Ultimate Addons 3 prong adaptor