Leland Rearm Kit for Manual Inflatable PFDs is a 24 gram CO2 cylinder with a Halkey-Roberts V86140 Bayonet Assembly. This rearm kits works with MTI Helios (MTI-4001), Sospenders Models 24MSPT, Guardian Series Essential 2500: Model 94-3055 as well as the Hobie Inflatable PFD S6779RG and S6779TG.