The airboy was the first bicycle mini pump sks produced more than 50 years ago and the airboy is back again as the companys latest premium model which is the smallest lightest mini pump sks ever madeit has a unique dual chamber design splitting the pump body in the middle allowing outstanding grip and efficiency that defies its ultra compact sizemicro size suitable for carrying in a cycling jersey pocketdual chamber inflation system for an easy pressure build uplarge comfortable grip area