Featuring a robust design with rubber support at the bottom for enhanced stability, these racks provide a secure platform. The racks can be locked together on each side, enabling users to attach multiple racks for larger experiments, ensuring efficient organization. Compatible with both 1.5 ml and 2.0 ml Micro Centrifuge Tubes, these racks offer versatility in accommodating various tube sizes. The design allows for easy removal and insertion of tubes, facilitating smooth laboratory workflows. Additionally, each hole is molded with numbers for convenient sample identification.