Advantage: With its stackable design, it 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 has a scale for easy positioning of samples, making it quick and efficient to retrieve or place vials when needed. Instruction: Insert the vials into the compartments of the vial holder. When you need to access a specific vial, simply 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 more. This tube holder offers versatility in accommodating various lab needs. Note: Ensure the tube rack is completely dry before reusing or stacking. Specification: 20ml Color: White Material: Plastic Package Contents: 1 x Test Tube Rack Only the above package content is included; other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture to vary slightly from the real thing. Measurement may vary by +/- 1-3 cm.