Advantage: The stackable design allows you to maximize storage space by vertically stacking multiple racks. Made from durable plastic, it is built to withstand daily use in busy laboratory environments. Each hole features a scale for easy positioning of samples, enabling quick and efficient retrieval or placement of vials. Instruction: Insert the vials into the compartments of the vial holder. To access a specific vial, locate it within the rack and gently lift it out. Application: This test tube rack provides a convenient and organized solution for storing and organizing autosampler vials, helping to streamline laboratory workflow. Suitable for HPLC, LC/MS applications, high-throughput analysis sample preparation, lab research, and other laboratory uses. Offers versatility to accommodate various lab needs. Note: Ensure the tube rack is completely dry before reusing or stacking. Specification: 20ml Color: Blue Material: Plastic Package Contents: 1 x Test Tube Rack Note: Light reflection and different displays may cause the color of the item in the picture to appear slightly different from the actual item. Measurement may vary by +/- 1-3cm.