This polypropylene tubes include blue HDPE leak-proof screw caps. The tubes and caps feature specially-designed flat threads for vacuum-type closure that is leak-free at a pressure of >700 mm Hg.

• Autoclavable at 121 °C and 15 psi for 30 minutes
• Radiation sterilized
• DNase, RNase, Pyrogen and latex-free
• Maximum RCF 14000

Highly smooth hydrophobic internal surfaces minimize wall effect. Silk-screen graduations and a frosted surface make writing easier.