Big volume barrel with Dual-Action (DA) technology inflates MTB tyres rapidly. Dual-Action doubles volume by inflating on both the push and pull strokes. Integrated dust cap keeps pump head clean and thumb lock lever insures air-tight seal.Presta/Schrader/Dunlop compatible head with integrated dust capAluminium barrelThumb lockInflates up to 60psiDual action pumping headAvailable with 60psi gaugeSide mount bracket included22.3x4.6x3.4cm126g without gauge