20 mL vials are constructed of high-clarity polypropylene co-polymer with high density polyethylene screw caps.
These vials have a widemouth opening for ease of use and the clarity of polypropylene material provides for clear visibility of the contents.
Our vials have externally molded-in graduations in 3 mL intervals and molded-in writing area for easy labeling, too.
The vial has an octagonal-shaped base which locks into the alpha-numerically labeled rack to allow for easy one-handed capping and uncapping.
Centrifuge tube racks are sold serparately.