Aijiren Autosampler Vials, HPLC Sample Vials 2ml with Write-on Spot and Graduations 10-425 Type Threaded Vial and 10mm Black ABS Screw Caps & Septa, Amber, Case of 100. $52.99. Aijiren HPLC LC 8-425 Screw Thread Vial Caps, 8 mm, PTFE/Silicone Septa, Black, Polypropylene, 100 pcs/pk. $15.99. Next.