Product Description. V6880. volume 20 mL, cap size 22 mm , polypropylene with metal foil liner, vial size 27 mm × 61 mm , with cap, pkg of 500 ea. Pricing. V6755. volume 20 mL, cap size 24 mm , polyethylene without liner, vial size 27 mm × 61 mm , with cap, pkg of 1000 ea.