The Topeak Mountain DA Mini Pump has an oversized aluminum barrel that fills large volume MTB and fat bike tyres with ease. Dual-Action (DA) doubles volume with each stroke and inflates tyres up to pressure fast. Integrated dust cap keeps pump head clean and thumb lock lever insures air-tight seal.Topeak Mountain DA Mini Pump FeaturesHead: Presta / Schrader / Dunlop with integrated dust capBarrel: AluminumThumb Lock / Handle: PlasticCapacity: 60 psi / 4 barVolume Per Stroke: 81 cc (pull + push)This version is supplied without Gauge.Added Features: Dual action pumping head, Side mount bracketSize: 22.3 x 4.6 x 3.4 cm / 8.8” x 1.8” x 1.3”Weight: 126 g / 4.44 oz