A portable floor pump. Compatible with both Presta and Schrader under the same simple steps:Insert, PUSH the collar down and TWIST it by one turn to secure engagement; simply pull back the collar to disengage.Key Features:Pressure bleed button ( CAD ) for ultimate accuracy.,.SpecificationHead: Push & Twist (Presta / Schrader).,Handle: CNC machined aluminium.,Barrel: CNC machined aluminium.,Base: CNC machined aluminium.,Capacity: 220 PSI / 15 Bar.,Size: 51 x 6 x 19cm..