Amazon.com : CO2 Cartridges Storage Case Compatible with Crosman, for Umarexss, for Leland 12-Gram 8-Gram Powerlet Cartridges, Soda Stream N2O Cartridges Holder for Air Rifles/Pistols - 40 Slots - Hard Case Only :
Amazon.com : Planet Bike 12g Threadless CO2 Replacement cartridges - 3 Pack : Sports & Outdoors
Amazon.com : AVI 12 Gram CO2 Cartridge - 10 Pack : Sports & Outdoors
CO2/HPA Conversion kit 12G co2 Cartridge Converters HPA Conversion Kit,S-TW and RG Threaded Replacing 12g Cylinder (S-TW Thread)
Amazon.com : ULTRAFORCE 12g refillable co2 Cartridge 3/8-24unf Threaded Beer/Paintball co2 Cartridge Rechargeable : Sports & Outdoors
Amazon.com : CO2 12g Tanks 5 Pack and 1500ct Steel BBS Bundle Compatible with Sig Sauer P365 BB Gun Air Pistol : Sports & Outdoors