12 ml screw cap tubes, round bottom

Transparent polypropylene construction, suitable for clinical and research applications.
Latex- and heavy metal–free.
Non-sterile models are free of DNase, RNase, ATP, human DNA, and endotoxins.
Flat-thread design for leakproof closure.
Hydrophobic surface ensures minimal disturbance during centrifugation.
Black silk-screen graduations with large frosted writing area.
Autoclavable at 121 °C.
Centrifugation resistance:

14,000 ×g (except code 429931: 7,500 ×g; codes 429950/429951: 3,500 ×g)
Adapters recommended for centrifugation.