The Wild Water Aqua Lung Short Barrel Pump is 4" in diameter and 22" in length.  This pump moves a fair bit of air per stroke and is ideal inflator for use with inflatable kayaks and smaller rafts. It's even small enough to fit neatly inside a medium cargo bag in the back of your Inflatable Kayak!
Unique click strap that holds the rolled-up hose securely in place, and also serves as a convenient carrying handle.