The Blackburn Air Stik 2 Stage Mini pump has dual mode internals with a high pressure and high volume mode easily changed with a switch on the end of the pump. Use the low mode for a completely flat tire or mountain tube. Switching the mode to high reduces the pumping effort required to more easily reach maximum pressure. The Blackburn Air Stik 2 Stage mini pump is nicely crafted from anodized aluminum for durability, good looks and performance. It is small enough to fit in a jersey pocket, but comes with a cage mount.