Certified Kits, screw thread vials, 12 x 32 mm, 9 mm thread, unassembled, size 2 mL, amber glass vial (with graduated marking spot), PTFE/silicone septum 2ml Screw neck ND8 Vials, thread 8-425 2ml Standard Opening, 8-425 Screw thread Vial, ND8, 12 x 32 mm Volume : 2ml (standard volume) Septa Red PTFE/White Silicone/Red PTFE, 8 x 1.5mm.