9mm Screw Closure with PTFE/Red Rubber Septum, Blue, Pre-Slit (100-pk)

These premium 9mm screw closures feature a PTFE-faced red rubber septum, engineered for reliable sealing in autosampler vials and chromatography applications. The pre-slit design enables effortless needle penetration while maintaining sample integrity, making them ideal for HPLC, GC, and general analytical workflows where consistent performance and contamination-free results are essential.

• Septum Material: PTFE/Red Rubber composite for excellent chemical resistance and reliable resealing properties
• Pre-Slit Design: Facilitates smooth needle entry, reducing coring and extending septum life
• Closure Size: 9mm diameter, compatible with standard 9mm screw-thread vials
• Color: Blue cap for easy identification and sample organization
• Quantity: 100 closures per package for cost-effective laboratory stocking
• SKU: 4000-57B