pompa topeak mini dual dxSmartHead works with Presta and Schrader valves without needing to replace parts. The double action doubles the volume with each stroke. Head SmartHead Fits Presta Schrader valves Barrel Aluminum Thumb lock Aluminum Handle Dual density polymer Capacity 120 psi 8 bar Additional features Double action pump head Includes side mounting bracket (item code TMD 2C) Measure Dimensions: 23. 1 x 4. 7 x 3. 2 cm 9. 1" x 1. 9" x 1. 3" Weight 150 g 5. 28 oz Volume