DURAN® GL 45 Aluminium Screw Closure, silver, closed top, with high temperature cap liner (PTFE-coated red silicone)
Aluminium is an alternative material to the plastic used in most screw closures for laboratory bottles. The caps are available as a closed-top cap with a high temperature PTFE coated cap liner, or as an open-top cap for use with septum or stopper. Metal closures offer a wide range of temperature tolerances and have a high mechanical strength. Aluminium offers superior barrier qualities that protect against light, moisture, oxygen, and other gases.
Features and Benefits:

• Free of “hydrocarbon-based plastics”, plasticizers, phthalates, etc.
• High temperature usage up to +260 °C for depyrogensation or hot air sterilization*
• Convenient: Thread fits all DURAN® GL 45 glass bottles from 100 mL to 20 Litres
• Secure sealing with USP <88> Class VI PTFE coated silicone cap liner
• Cap liner is supplied unmounted for easy processing and is replaceable
• Convenient opening and re-closing as the knurling provides extra grip for wet or gloved hands
• Protection: Electrically conductive material – ESD dissipation
• Versatile: Open topped (aperture) closure can be used with DURAN® GL 45 Bromobutyl Rubber Stopper or Silicone Septa
• Extra protection – Optional plastic 45 mm Over-cap seals the open topped (aperture) cap

Application: As alternative to plastic screw caps for laboratory bottles, High-temperature processing and applications, Low-temperature / cryogenic sample storage, Pharma API and sensitive material storage, The open topped Aluminium cap is a “non-plastic” alternative to the PBT plastic aperture cap