Coravin Wine Preservation System Capsules (Pack of 2) Coravin Capsules are the power source for the Coravin Wine System 99% pure argon gas, used by winemakers for years. Pressure: 2600 PSI, Seal: Synthetic Rubber, Cap: Fiberglass Reinforced Nylon Proprietary seal specifically designed for the Coravin Wine System Each capsule allows you to access up to 15 glasses of wine (5 . pours) Two (2) Coravin Capsules in a box