Product Info 2x 25g CO2 Cartridges CNC machined aluminium alloy inflator Inflates MTB tyre (29'' x 2.4C) up to 30psi from flat Push down design to easily control CO?2release Stainless steel internal pin Soft touch button & neoprene sleeve to prevent freeze burn Dual head nozzle, compatible with both Presta & Schrader valves Thread on nozzle for airtight fit