The Onyx Outdoor A-33 33 Gram Auto In-Sight Rearming Kit is a must have for the outdoor adventurer. When the chamber is inflated by CO2 cylinder, the rearming kit is required. Kit includes a 33 gram CO2 cylinder with Halkey-Roberts bayonet assembly and water soluble bobbin, fits A-33 In-Sight inflatable life jackets (#1334, #1335).