These super strong and versatile TUFFBLOK™ 4-way tube racks hold variety of tube sizes in a single rack. Just flip the rack to accommodate the tubes you're using, and get to work!

• Link multiple racks together for a custom rack solution
• Produced from autoclavable polypropylene
• Heavy-duty construction is durable and chemical resistant
• Multiple colors available for benchtop organization at a glance
• Numeric markings for sample identification

The 4 sides hold the following tubes: 4×50 ml tubes, 12×15 ml tubes, 32×1.5 ml tubes, and 32×0.5 ml tubes.