9 mm Solid Top Polyethylene Closure, 10mil thick membrane, 100/pk

• Compatible with all 9 mm screw-thread vials.
• Molded, 10 mil, solid, pierceable cap.
• PTFE-free—ideal for PFAS analysis (e.g., EPA 537) and other PFAS-sensitive methods.

Note: Polypropylene vials and caps prevent sample contamination from PTFE-coated septa. However, since polypropylene caps do not reseal, evaporation occurs after injection. Multiple injections from the same vial are therefore not possible.