As a Trans-Atlantic flight pilot, you may be forced to leave your (easy to remove) ISPLR CO2 cartridges behind due to hazmat restrictions at airports and international shipping restrictions. Have these cartridges shipped to your U.S. destination, tightly screw both cartridges into your ISPLR, and your ready for your next trip!
Note: Applies to loose pack, soft case ISPLRs only. Hermetically sealed ISPLR CO2 cartridges are sealed within the vacuum packing material and cannot be accessed.