Cyralux™ 20 mm Sterile Ready-to-Use (RTU) Serum Stoppers provide a pharmaceutical-grade bromobutyl elastomer closure for 20 mm crimp-neck vials used in liquid injectable filling. Typical compatible formats include 6R/5 mL, 10R, 20R, and 30R vials. Their solid-plug serum design combines a controlled flange with low-fragmentation, self-sealing properties for dependable needle penetration and crimp seating. These latex-free, dark-gray stoppers are washed, siliconized, automatically inspected, and terminally sterilized before shipment. The 20 mm format is suited to manufacturers seeking a sterile closure option across several vial capacities while maintaining the same Cyralux™ bromobutyl formulation.
