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Wholesale 1.5ml 8mm 8-425 HPLC Vial Screw Caps with Septa C83. Standard 8-425 Thread: Compatible with all common autosamplers for GC and HPLC applications. High Chemical Inertness: 8mm PTFE/silicone septa offer excellent acid and alkali resistance. Durable Borosilicate Glass: Vials manufactured from clear or amber borosilicate glass. Easy Puncture Design: 8mm wider opening facilitates easy needle puncture. Customizable Septa Options: Available with various septa combinations including PTFE and silicone. Customizable Cap Colors: Screw caps available in black or white options. OEM/ODM Services: Full OEM and ODM services available for custom branding. Fast Lead Time: Peak and off-peak season lead times within 15 workdays.