Vial Screw Cap 2 Ml found in: 2.0 mL Preassembled Vial Kits (8 mm/425 Screw-Thread, Unmarked Vials, Septa, and Caps), Automatic Liquid Sampler Supplies,.. Basic Supply Kit (2713N15) contains 10 ml syringes (6/ea), 23/26 gauge needles, 4 ml vials with diffusion caps (144/pk), 2 ml automatic sampler vials with screw caps (1,000/pk), GC septa (25/pk), and vial racks (5/pk).Basic Supply Kit