TheTopeak Tubibooster X Air Chamber works with a floor pump to quickly fill your tyres and ensures proper installation on a tubeless rim at home. Once you flip the selector from “CHARGE” to “INFLATE” mode, air bypasses the chamber as you use the floor pump to inflate your tyre to the perfect pressure. An integrated flexible hose with pump head works with Presta and Schrader valves and takes stress off the valve stem while pumping. Topeak Tubibooster X Air Chamber Features Utilizes standard pump to fill air into air chamber to seat and inflate tubeless tyres Switch the selector to change between Charge and Inflate modes Pump head compatibility: Presta pumps Tire valve compatibility: Presta / Schrader valves Air chamber: one liter, store up to 200 psi / 14 bar air pressure (varies with the pump capacity) working pressure - 1800 psi / 124 bar Material: Aluminum / rubber / engineering grade polymer Added feature: Flexible hose Size: 36 x 11.4 x 8.6 cm cm / 14.2” x 4.5” x 3.4” (total) 28.5 x ø8.1 cm / 11.2” x ø3.2” (air chamber) Weight: 985 g / 2.17 oz (total) 820 g / 1.81 lb (air chamber)