Secure-Lock™ polypropylene microcentrifuge tubes offer a special locking clasp to produce a more secure closure.

• Autoclavable to 121 °C
• Pierceable lid
• Etched surface on side of tube for sample identification

This will help to prevent tubes from opening during centrifugation, boiling, storing, freezing and shipping. They are graduated at 0.5, 1.0 and 1.5 ml.