NRS Wonder Pump HP The included pressure gauge takes the guesswork out of inflating your boat or board The aluminum shaft, sturdy handle and tough polypropylene housing are built to withstand lots of use The pump comes with a twist-fit C7 Leafield Valve adapter and a full set of adapters for other types of valves Each full stroke puts out 0.60 gallons (2.3 liter) of air Action: Inflate only