The Topeak JoeBlow Booster Floor Pump has an integrated aluminum air chamber that stores an air charge of one litre, up to 160psi / 11 bar, to quickly fill your tyre and ensure the proper installation on a tubeless rim, just like a shop compressor. Once you flip the selector from “CHARGE” to “INFLATE” mode, air bypasses the chamber and flows directly into your tyre like a standard pump. The top-mounted easy to read gauge, air release button and comfortable dual density polymer grip, combined with its extra-long hose and stable base makes mounting tubeless and standard tyres a breeze!Topeak JoeBlow Booster Floor Pump FeaturesHead: SmartHead® DX3 w/ air release button & x-long hoseBarrel: Anodized aluminum w/ large cylindrical aluminum chamberGauge: 160 psi / 11 bar, Top mount analogPressure Tuning: Air release buttonHandle: Oversize padded / Dual density polymerBase: SteelAdded Feature: Hose dockSize: 74 x 25 x 18 ... More info