Lezyne Twin Drive Co2 Combo Kit Threaded PV/SV Black/Silver 2 - 25g 25G KitA durable CO2 dispenser built from CNC machined aluminum, the Twin Speed Drive CO2 features slip on valve operation for easy inflation A Twin slip fit head presses onto Presta or Schrader valves and a neoprene sleeve insulates your hand from the cold during discharge Twin Kit includes Twin Speed Drive, Co2 cartridges and tire levers TECH SPECS size Twin Kit w 2ea 25g