The PRO Micro CO2 Inflator System is a no-fuss roadside inflation solution built for riders who need to get back rolling fast. The kit includes a compact inflator head, a 16g threaded CO2 cartridge, and an insulating sleeve — the sleeve matters more than it sounds, since cartridges drop to very cold temperatures during discharge. The head works with both Presta and Schrader valves: thread it onto a Schrader, press it onto a Presta. Threading in the cartridge breaks its seal and releases the spring-loaded valve, so keep the cartridge separate until you actually need it. A 16g cartridge is enough to fill most adult bicycle tires to a rideable pressure. All threaded CO2 cartridges share a common thread standard, so any compatible spare will work as a backup — carrying two is a sensible habit. Includes: inflator head, 16g threaded cartridge, insulating sleeve Compatible valves: Presta and Schrader Works with any standard threaded CO2 cartridge