TheTopeak Roadie TT Mini Pump is aTwin Turbo, full metal, pocket sized mini pump. ThisTopeakpump transfers larger air volume from a bigger diameter outer chamber into a smaller diameter inner chamber to deliver more air at higher pressures to fill tyres 50% faster and easier. Integrated dust cap keeps pump head clean and thumb lock lever ensures an air-tight seal.Topeak is the world leader in developing and producing innovative accessories designed to make cycling more convenient, more accessible and more fun at every level.Topeak Roadie TT Mini Pump FeaturesHead: Presta with integrated dust capBarrel / Thumb Lock / Handle: AluminumCapacity: 160 psi / 11 barVolume per Stroke: 31.6 ccAdded Features: Side mount bracketSize: 16.5 x 3.3 x 2.35 cm / 6.5” x 1.3” x 0.9”Weight: 90 g / 3.17 oz