Yepp Mini children"s bicycle seat comes equipped with one Mini handlebar adapter * Having a second adapter can come in handy when it"s time to switch the seat from one bike to another * In addition, you can use the Yepp Mini handlebar adapter to fit the Yepp Windshield to another brand?s front seat * Adapter can be attached to a steel, 1.5-inch exposed quill-type stem * Thread-less adapter is also available (sold separately)