Maddog 5 Year 48ci 3000psi Compressed Air HPA Tank for Paintball, Airsoft, PCP Airgun. Enhanced accuracy, more consistent velocity, and higher performance in all weather conditions over a comparable CO2 tank! Compatible with all standard paintball markers that operate on High Pressure Air. High quality aluminum high-pressure compressed air tank designed with safety as a top priority. These HPA tanks are brand new, with fresh ~5-year hydrotest dates. Each and every cylinder meets or exceeds industry regulations for quality and they're manufactured in facilities that have won awards for proactive safety practices and regulations. All Compressed Air HPA Paintball Tanks are Shipped EMPTY and must be filled prior to use. 5 Year Re-Test Cycle - The date stamped on these tanks is the date the tank was manufactured, NOT an expiration date. Tanks are good for 5 years after the stamped date until they will need to be re-hydrotested.