Mount your iPhone quickly and easily with a RAM EZ-ON/OFF™ handlebar base. Designed to fit most common handlebar sizes, this compact and durable mount is ideally suited to the open road or trails. Uses common zip ties to attach to a variety of handlebar diameters. Made of high strength composite, it is light weight too. Adjustable to allow for the best viewing angle, this product is perfect for any cyclist and their compact electronic device. This mount is designed to hold the following devices: Apple iPhone 4 Note: The "U" in the part number reflects product packaged in poly bag. Mount includes 12 degree tappered shaft for tapered handlebars. This mount is NOT compatible with the 1st generation Apple iPhone, Apple iPhone 3G or iPhone 3G S.