Alwsci Red PTFE Silicone Septa 11mm Snap Ring Top Cap. High Chemical Resistance: PTFE septa form an inert barrier between sample and carrier material. ISO 9001:2015 Certified: Manufactured under high quality standards with full client responsibility. Custom Color Options: Cap color available in Clear, Blue, Red or customized to your needs. OEM/ODM Service: Supports OEM and ODM services with 10 R&D engineers available. 2-Year Warranty: Comprehensive 2-year warranty coverage for all products. Clean Room Production: Produced in a 5,000 SQM 100,000 grade clean room to avoid contamination. Wide Application Scope: Ideal for HPLC, LC/MS, GC/MS in pharmaceutical, food, and environmental industries. Fast Lead Time: Average lead time within 15 workdays for both peak and off-season.