2Pcs PTFE Stopper Plug, High Temperature Resistance Lab Stopper for Chemical Supplies, 14# and 19# Stirring Rod Plug, Non - Inert Sealing Cap for Laboratory Glassware (14 Mouths)
Extreme Temperature Resistance: This PTFE stopper plug operates reliably from -180°C to +260°C, making it ideal for demanding lab environments where thermal stability is critical during heating, cooling, or cryogenic procedures.
Universal Chemical Compatibility: The PTFE stopper plug resists nearly all chemicals except molten alkali metals and liquid fluorine, ensuring safe, long-term use with acids, bases, solvents, and reactive substances in laboratory settings.
Non- and Inert Design: Made from physiologically inert PTFE, this stopper plug won't react with samples or contaminate experiments, perfect for pharmaceutical, food testing, and biological research requiring high purity standards.
Superior Weather and : The PTFE stopper plug maintains its surface integrity and performance even after prolonged exposure to air, light, or humidity, guaranteeing consistent sealing in storage or active lab use.
Precise Fit for Common Lab Glassware: Includes two sizes (14# and 19#) of PTFE stopper plug designed to securely fit standard stirring rods and flask necks, ensuring leak-proof seals during mixing, distillation, or sample containment.
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