For a fast and reliable way to inflate your exercise balls, try the Champion Sports High Volume double-action hand pump. Pump out air on both up and down strokes, making this air pump a quick and easy way to inflate any workout ball. The large hose allows you to pump from any comfortable angle, and the valve adapter is designed to fit virtually any exercise ball, making this pump both convenient and reliable. Material(s): Plastic; Output Capacity: 110 L.