9mm Screw Closure with PTFE/Red Rubber Septum – Blue Cap, 100-pk

These 9mm blue screw closures feature a clear PTFE-faced natural red rubber septum, engineered for reliable sealing in GC and HPLC autosampler applications. The PTFE layer provides excellent chemical resistance and prevents sample contamination, while the red rubber backing ensures optimal resealability for multiple injections. Ideal for use with standard 9mm screw thread vials in analytical chemistry, pharmaceutical testing, and quality control laboratories.

• Closure Type: 9mm screw thread cap in blue polypropylene
• Septum Material: Clear PTFE bonded to natural red rubber for chemical inertness and flexibility
• Compatibility: Designed for use with standard 9mm screw thread autosampler vials
• Applications: GC, HPLC, and LC-MS sample analysis requiring secure, leak-proof sealing
• Quantity: 100 closures per package
• P/N: 4400-51B