1-4mL Autosampler Vials for HPLC, UPLC, GC Home » News » vials with caps » hplc vials and caps in clear for HPLC sampling supplier Aijiren. Last News. ... Various vials, including Screw-Thread, Crimp-Top, Certified, WISP, Headspace, Versa, Precleaned VOA Sampling, Accuform Micro-Vials, and Snap-Top caps. ...