The lezyne trigger speed drive co2 is a cnc machined aluminium dispenser with brass internals the trigger valve operation allows for easy and controlled inflation and fits presta valves only coming supplied with a neoprene sleeve which fits snug around the cartridge this insulates your hand from the cold during the discharge the trigger speed drive is compatible with threaded co2 cartridges only coming supplied with one cartridge you can use this as soon as you get it