The birzman zacoo inflator and bottle set perfect little pump for quick refill on the bike with a special neoprene jacket to keep you from feeling the cold from the cartridge birzman zacoo inflator and bottle set features accepts all co2 cartridges cnc finished body coldness insulation function compatible with all threaded co2 cartridges comes with a green colour pu coldness insulation grip3 pcs co2 cartridges and a co2 joint fills mtb tyre 26 to 30psi road ty