Ensure your safety on the water with the Onyx 33-gram CO2 cylinder with Halkey-Roberts bayonet assembly, and a water-soluble bobbin. This rearming kit fits A-33 IN-SIGHT (Automatic/Manual) inflatable life jackets, providing versatile and efficient inflation. Before use, always verify the CO2 cylinder's correct size and confirm it has not been previously fired to guarantee proper operation. For added security, the U.S. Coast Guard suggests purchasing an extra rearming kit to familiarize yourself with your inflatable life jacket's function, making sure you are prepared for any water emergency situation