They do not have a threaded cap. They also have other uses.
CO2 gas bulbs for use in home brew beer making brewing. 4 x 10 boxes = 40 bulbs
CO2 gas bulbs for use in home brew beer making brewing. 10 x 8g
Youngs 5 x 16g CO2 Cartridge Gas Injection Bulbs For Home Brew Beer Making
16g CO2 Chargers for Beer Tap – 10 Pack | Natural CO2 Bulbs Fits All Dispensers
CO2 8g Gas Bulbs Pack of 10 Soda Siphon Pressure Barrel Keg Beer Homebrew
CO2 Cartridge Unthreaded 16g 20 Gas cylinder beer keg charger bike tyre inflator
