Benchmark Scientific R4040-500 1 x 50 ml Tube Holder for RotoBot, 28 to 30 mm Diameter, Vertical Orientation, Pack of 2. This pack includes two 50ml tube holders from Benchmark Scientific. These holders are designed to securely accommodate 50ml tubes, providing stability during various laboratory procedures such as mixing, centrifugation, or sample storage. Made of durable materials, these holders ensure reliable performance and long-lasting use. They are easy to handle and use, contributing to efficient workflow within the lab. Ideal for researchers, scientists, or professionals working with 50ml tubes, these holders offer a practical solution for organizing and handling tubes safely. Upgrade your lab setup with these convenient 50ml tube holders to streamline your work processes and enhance overall productivity.