13-425mm Black Screw Cap with Red PTFE/White Silicone Septum, 100-Pack

This 13-425mm black polypropylene screw cap features a premium red PTFE/white silicone septum, engineered for reliable sample storage and analysis in chromatography applications. The dual-layer septum construction provides excellent chemical resistance and resealing capabilities, making it ideal for HPLC, GC, and autosampler systems where consistent performance and sample integrity are critical.

• Thread Size: 13-425mm standard threading for universal compatibility with 4mL screw thread vials
• Septum Material: Red PTFE/White Silicone dual-layer construction for superior chemical inertness and flexibility
• Cap Color: Black polypropylene for easy sample identification and light-sensitive applications
• Quantity: 100 caps per pack for laboratory efficiency and inventory management
• Applications: Suitable for HPLC, GC, autosampler systems, and general sample storage
• SKU: C4015-75ANL