Discover precision-engineered 20mm Aluminum Crimp Caps with Septa designed for chromatographic analysis and sample integrity. Our caps feature interchangeable septa in white PTFE, blue silicone, molded butyl, and more, with customizable center hole sizes (8mm/9.5mm/10mm) to fit Karl Fischer vials and headspace applications. Compatible with Agilent, Thermo Scientific, and Waters autosamplers, these caps ensure minimal extractables for sensitive MS workflows
