Cyralux™ 20 mm sterile ready-to-use (RTU) lyophilization stoppers are pharmaceutical-grade, dark-gray, latex-free bromobutyl elastomer closures designed for freeze-dried injectable products in 20 mm crimp-finish glass vials. The two-leg (igloo) vented design permits vapor escape while the stopper is partially inserted during the freeze-drying cycle, then seats fully under lyophilizer shelf pressure. Typical compatible vial formats include 6R / 5 mL, 10R, 20R and 30R; verify fit and container closure integrity with your complete vial-and-seal configuration.
Engineered for higher-volume production planning and repeat purchasing, these closures use the same Cyralux™ bromobutyl formulation as the wider stopper family. Their flange and top geometry are designed to reduce sticking to lyophilizer shelves and support automated pre-placement. The 20 mm finish is intended for standard crimp-neck injection vials, including European blowback, North American blowback and straight-wall (no-blowback) ISO vial configurations.
Each 1,000-count sterile-barrier bag contains RTU stoppers processed with validated WFI-grade washing, standard siliconization, 100% automated vision inspection and terminal sterilization. Double-bagged packaging supports staged introduction into controlled environments and reduces the need for in-house washing, siliconization and sterilization before use. The 1,000-count bag is intended for teams planning larger filling campaigns or standardized purchasing, subject to approved process and supplier qualification.
For purchasing and quality review, request the available Certificate of Analysis, Certificate of Conformance, sterilization certificate, lot traceability and technical drawings. Confirm the specific sterilization method, shelf-life dating and supporting compatibility/CCI data for your application.
Technical specifications and purchasing
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Design
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Two-leg (igloo) vented lyophilization / freeze-drying stopper
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Nominal closure size
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20 mm crimp finish
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Pack quantity
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1,000 stoppers per sterile-barrier bag; double-bagged
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Elastomer
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Dark-gray, latex-free pharmaceutical-grade bromobutyl
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Typical vial formats
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6R / 5 mL, 10R, 20R and 30R
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Processing
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WFI-grade washed; siliconized standard; 100% vision inspected; terminally sterilized
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Design compatibility
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European blowback, North American blowback and straight-wall ISO vials
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Unopened shelf life
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3 years from sterilization, per supplied specification
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Storage
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15–30 °C; ≤60% RH; protect from light and ozone
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Quality documentation
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CoA, CoC, sterilization certificate, traceability and drawings available
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Availability and estimated delivery (ETA)
The 20 mm / 1,000-count RTU lyophilization stopper pack is listed within the USA-stocked product family for fast shipment. Exact stock, order processing time, shipping date and transit ETA are not specified in the source. Contact the sales team with quantity and destination to confirm availability and obtain an estimated dispatch and delivery date.
