The MST™ micro screwcap tubes are recommended for storing blood/serum samples, cell cultures, sperm and other biological specimens at vapor phase liquid nitrogen temperatures (–320 °F/–195 °C).

• Made of polypropylene co-polymer (PPC)
• Uniform length allows for maximum and efficient use of storage space when storing MST Tubes of mixed sizes
• Printed graduated versions are available for 1.5 and 2.0 ml volumes to ensure a smooth internal surface

They feature a built-in flange at the neck of the tube to further reduce the possibility of leakage and provide a ridge on the surface of the tube for minimal surface contact during transport.

MST™ flat top caps feature a flat head with a smooth surface. They fit all sizes of MST™ tubes and have a molded-in sealing ring. They are available in a wide variety of colors including chocolate for light-shielding applications.