This pumpinflator is really tiny, small enough to fit in a saddle bag along with a few threaded CO2 cartridges. It's got an extension sleeve for presta valves, and you'll need to extend this sleeve before you fill a presta inner tube. Overall, a great piece of kit for road riding.
I want to start by addressing a common knock against mini pumps. Yes, it takes a lot of strokes to get the pressure up to where you normally would ride your tubes, but to me that's the beauty of this pump. It's incredibly small even for minipump standards, and it's got a controllable valve for threaded CO2 cartridge so you can start hand pumping first to make sure the tube is seated, and then use the CO2 cartridge to get to your desired pressure. I had to use this a few weeks ago after a particularly unfortunate descent, but it worked like a charm and I was absolutely glad I had this with me! Before this I used to carry a dedicated CO2 valve and a mini pump, but with this I've replaced two items with one, better functioning, smaller, and lighter item! Love it.
Small enough to fit in a jersey pocket. A good inflator with excellent control. The screw on chuck ensures a good connection with the valve. It takes several hundred strokes to get enough pressure to ride on, but great for topping off or emergency purposes. Pumping is easier if a cartridge is installed, giving you handle to push against without stressing the valve.