Pre-assembled packs come ready-to-use with cap and septum of your choice attached to the vial. A time/labor-saving product for use on your Aijiren Autosampler or any rotating tray automatic sampler. Wheaton Sample Vials, 2mL or 0.07oz, Clear, 8-425 Finish with 14B Rubber Liner, Type I Borosilicate Glass (2 mL E-C Vial, Glass Clear, 8-425 Rubber Lined Cap)2 mL E-C Vial, Glass Clear, 8-425 Cap