Lalizas Re-arm kit for self-inflating Lalizas JS1 Child lifejackets. The kit comes with a 20gr CO2 gas cylinder and cartridge. It is adviseable to check the cartridge if it has been stored in a damp place for some time and, as a safety precaution, we recommend the replacement of the cartridge/cylinder at the beginning of each sailing season. In this case (as long as the gas cylinder is intact), the cartridge alone should be ordered.