These externally threaded polypropylene vials come with white polypropylene caps. the cap attaches to the outside of the vial, which means you get maximum vial capacity while the lip, as well as your hands, are protected from contamination. the vial and cap can be autoclaved. vials are available with or without the white marking area for sample identification. vials and caps are packed separately in polyethylene bags. color coded caps can be purchased separately. see catalog numbers 242554 and 242566.
