Check the listing for details. 20 CO2 16g TH cartridg C02 bicycle bike tire pump refill 16 gram 3/8 thread BULK. Color: Silver, Condition: New. Listed at 23.90 USD. Food-grade CO2 20 CO2 16g TH Threaded cartridges stnrd 3/8" Unboxed/loose/Bulkchargers / cartridges weld-sealded clear-coated steel Nearly Unlimited shelf-life premium food-grade CO2 FAST, FREE shipping from FL These 16g CO2 cartridges are compatible for many uses: bike tire / sports ball inflation power cleaner / air duster beer/soda carbonation ... and many other products that requireSTANDARD SIZE / Mil Spec * 16 gram threaded CO2 cartridges * (consult your product owners manual)* Not compatible with Gen.Innov brand inflators! * (Their cartridges have different "necks" so that they work only with their products) Buyer assumes full responsibility for safe handling and disposal of item. Buyer affirms that he or she is of legal age to purchase compressed gas (ORM-D consumer commodity) cartridges -usually 18 or older in most states -consult your local and state laws. Warning: Highly-pressurized contents (over 800 psi) Do not expose to heat (122 degrees or greater) or direct sunlight, do not incinerate, do not puncture outside of intended receptacles. Not for medical or internal use, do not inhale. Seller is not responsible for misuse or abuse of item. Buyer assumes all responsibility of purchase and use.