This high-quality "Buna" O-ring from Fisnar, specifically designed for 5 cc cartridges, guarantees optimal sealing and is ideal for use in various cartridge systems. The black color of the O-ring ensures discreet integration into the overall system. Each packaging unit contains 10 pieces, allowing for cost-effective procurement and storage. The precise size adaptation to 5 cm³ cartridges and the robust nature of the material promise a long lifespan and reliability. Ideal for technical purchasers who value quality and efficiency.