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