This enables the user to fill the air tube rapidly with over 300cc of air per stroke and then change down gear (less than 200cc per stroke) to reach recommended fill pressure with ease. 

The result: you can fill your air tube Fastr, fuller and with much less effort! 

Of course there's more to the FX pumps than that. Both models contain a built in moisture trap, which means you do not have the inconvenience or expense of changing additional 'dry packs'. The pumps mechanism has been endurance tested by machine so you can be sure of many years trouble free use.