Centrifuge tube, conical bottom and Flat cap, 15 ml, sterilized

Centrifuge tube conical bottom and flat cap. Volume 15 ml. Sterilized, DNase/RNase free and Non-pyrogenic. presentation: in rack or bulk.
Longer length screw caps with sealing ring prevent any leakage.
Easy-to-read black graduations are accurate to ±2%, 1ml increments (15ml) or 2.5ml increments (50ml).
With a large unerasable frosting white printed writing area.
Both the graduations and writing areas are chloroform-resistant.
Engraved graduation at the conical bottom of each tube.
Max rotate speed up to 12,000xg for conical bottom tubes, while 6,000xg for self-standing tubes.
Autoclavable at 121ºC and freezable to -80ºC.
Leak-proof