keg smiths 16 gram c02 cartridge - threaded food grade 16 gram co2 cartridges (5) keg smiths keg smiths food and beverage grade 16 gram co2 cartridges are perfect for threaded device applications. the co2 cartridges are 100% food and beverage safe. compatible friendly | threaded co2 cartridges fit fits most inflators. threaded cartridges are useful for multiple applications and devices. the 3/8" standard thread size makes it fit with most applicators. outdoor use ready | our16 gram co2 cartridges work great for mountain bike tires and road bike portable inflators. our beverage and good safe cartridges have been leading the way for quality, convenience, and trust. please contact us with any questions.