I bought 1 and was so impressed with it I went and bought more for those that would like one. There small, light pumps both ways and effective at the cost of £4.50 thats a quid higher than I paid for them so it will go in to TVTR funds! I have now used it to get out of jail 3 times on the trail and used on push bikes. (Warning not for those that don't like a short stroke in both directions)! Can't remember but I think 3 or 4 available.
