The iPhone Tubular Handlebar Pro Case was developed to provide the highest resistance to water, snow, impacts and dirt on the motorcycle, as well as featuring innovative, ergonomic lines. The universal handlebar mount installs in seconds on tubular handlebars ranging from 16-30mm ( 0.63" to 1.2" ). The kit includes a safety strap for additional piece of mind. Your iPhone will rest comfortably inside the shock absorbing interior liner of the case, with dual locks to make sure it stays locked in place no matter how rough the terrain is.