This re-arm kit contains everything you need to re-arm your Mustang Survival MD2010 manual inflatable PFD. Use only Mustang Survival re-arm kits. Use of other re-arm kits may result in improper operation or failure to operate and will void the product’s warranty.Re-arm kit contains:One 20 gram CO2 CylinderOne ready status indicator pin* Product expiration dates may vary -WARNING: Cancer and Reproductive Harm -www.P65Warnings.ca.gov