Features compact all in one co2 and tyre repair kit from lezyne includes twin speed drive two threaded 16g or 25g co2 cartridges and lever kit custom neoprenevelcro strap cnc machined aluminium construction composite matrix simple twist onoff operation compatible with all threaded co2 cartridges twin slip fit head works with both presta and schrader valves weight 16g cartridge 177g 25g cartridge 270g