Suitable view video on Amazon.com, this small, handy, about 19 cm long air pump for Schrader and Presta valves. With included is an adapter for balls and a holder, of the frame of the bicycle (holes Trinkflaschenhalter where available) can be attached. The air pump weighs lt. My kitchen scale only 74g, so that there is no method as "unnecessary" denote weight. Up to 7 bar pressure pump creates these build me a small, handy powerhouse!