Portable twin turbo pump with constant resistance from low to high pressure. Presta nozzle with 2 cylinders for efficient air filling. Twin turbo technology can be refilled up to 160 psi. 1 stroke. Air quantity: 41.4 cc. Aluminum alloy cylinder. Frame mounting clamp included. Dust cap included. L 7.7 x W 1.3 x H 0.9 inches (195 x 33 x 23.5 mm). 3 mm). 3.5 mm). 3.5 mm). Product color and size may differ from the actual product color depending on your display. Product specifications, logo design, etc. may be subject to change for product improvement. We also cannot answer measurements or personal fit that the manufacturer does not announce. Please be aware of