Vials, screw top with black polypropylene hole cap (10-425 thread), large opening, pre-assembled. Vials, screw top with black polypropylene hole cap (10-425 thread), large opening, pre-assembled. Product Number. Product Description. SDS. 27531. volume 2 mL, clear glass vial, red PTFE/silicone septum, pkg of 100 ea.