Vials, screw top, clear glass (vial only) volume 40 mL, clear Vials, screw top, clear glass (vial only); Autoclavable, easy to maintain. A vial is used to store or as a closure type. 27186 Screw cap, solid top with PTFE liner, pkg 100, green melamine resin solid cap, F217/PTFE liner, for use with 20 or 40 mL