RESERVE is O.penVAPE’s premium line; offering high-potency, ultra-refined 100% pure cannabis oil: free from any carriers and excipients. The Reserve cartridges are available exclusively in specific strains and always in the universal 510-threaded cartridge. Each package has testing results (THC, CBD, CBN) labeled, provided by CW Analytical Laboratory. Each Reserve cartridge yields apx. 105 puffs at 4MG per pull.