Autosampler Vials & Caps for HPLC & GC - Aijiren Tech Scientific. Standard 2 mL screw top vial-cap kits; including SureStop vials with AVCS caps, 4, 8, 12, 16, 20, or 40 mL vial-cap kits, 20 mL screw top vials with 24 mm caps. Get Price. 2mL Autosampler Vials with Caps, HPLC Vials, 9-425 Amber Glass.