Jul 30, 2020 · Large open 9 mm diameter 2ml Screw Cap Glass Vials (40% larger clearance than standard narrow opening bottles) can be used as 4 mL and 6 mL bottles as washing, waste or storage bottles. Choose certified bottles for full compatibility with aijiren auto samplers for best results. 2ml Screw Cap Glass Vials, 12mm Diameter, 32mm Height, 9-425 screw top.