Our CO2 Cartridges are filled with 100% pure CO2. CO2 Cartridges are made of 100% recyclable steel, they are lacquered or anodized, not refillable and contain approx. 16 gms pure CO2 under pressure. Comes in unbranded plain white box. Will fill: 1 x Road Bike 27" tyre to 130PSI/9BAR 2 x BMX 20" tyres to 30PSi/2.1BAR 1 x Mountain Bike 26" x 2.1" tyre to 40PSI/2.7BAR 4 x 16g will fill Motorcycle 180/55/17 tyre to 32PSI/2.2BAR OVER 18's ONLY: This product is not for sale to under 18's. Resellers please ensure your customers are over 18. Recycling Gas cartridges are not refillable. They are made with 100% recyclable steel. They are safe to put in with your tin cans etc for collection. Please do not dispose of unused cartridges! More information about CO2: CO2 or Carbon Dioxide is an odorless, colorless, non inflammable gas with a light sour taste, it does not contain any minerals, salts or other solid ingredients. Our CO2 Chargers are filled with 100% pure CO2. IMPORTANT SAFETY DATA: Cartridge contains 16g of Carbon Dioxide (E290) under very high pressure. Please only use with a device approved for this cartridge and follow manufacturers instructions. Non-aerosol. Non refillable. Recyclable steel. Never dispose of full cartridges. Keep out of reach of children. Explosion danger: 50C max temperature. Do not take onboard an aircraft. Colour: Gold. If you are burnt by freezing CO2 you must immediately seek medical advice. A CO2 burn can cause deep tissue damage which is not immediately obvious at the time of the injury.