What is a 16 gram threaded CO₂ cartridge, and which devices use it? A 16 gram threaded CO₂ cartridge is a single‑use steel cylinder that contains 16 grams of food‑grade carbon dioxide. Unlike smooth‑neck chargers that are pierced by a pin, threaded cartridges have internal or external threads on the neck and screw directly into a compatible dispenser or regulator. Devices that typically use 16g threaded CO₂ cartridges include: Certain older or European‑style soda siphons (less common than smooth‑neck types) Some portable bike tire inflators (though those use non‑food‑grade CO₂) Specific laboratory or beverage carbonation adapters A few mini keg systems for home carbonation https://www.rotasswhip.com/16g-threaded-co2-cartridge