The CV 470 cartridge is filled with a 450 g butane/propane gas mixture in a ratio of 80/20. It is very stable and powerful, offering a long burn time. This cartridge is specifically designed for use with Campingaz devices from the 270/470 line. Disposal note: Empty cartridges can be returned at the tin can collection point. Partially empty valve cartridges that are no longer needed can be disposed of through the special waste disposal service of the municipality. Piercing cartridges are filled with a powerful butane/propane gas mixture and are secured by either two brackets or a base, depending on the device's holding mechanism. They should only be removed from the device once they are completely empty.