The 16g Barbieri CO2 cans with thread have the standard high quality screw connection (made in EU). They inflate the inner tube or bicycle tire in a second without effort.

They are ideal for medium diameter wheels (27.5 "and Gravel).
As for the size of the cartridges, a 12g or 16g CO2 cartridge is recommended for road bikes.

For example, a 16g CO2 cartridge allows you to inflate a 23c tire to about 130 psi and a 25c tire to about 110 psi. The can is useful but we recommend that you always carry the pump with you! 

Attention cartridges under pressure, avoid exposure to the sun or temperatures above 50 ° C. For waste only empty cartridges. The content of the cartridges freezes when filling the tire, use gloves. Respect the environment. Do not throw away the can after use.