If you need to conduct experiments, analyze samples, or store tubes, our tube holder can be a practical solution. Sturdy construction make this sampling tube holder suitable for most of your tube storage needs, and not easily deformed or broken, withstand long period using. Features -Color:White -Material:Plastic -Size:18.50X18.50X9.50cm/7.27X7.27X3.73in -Hole diameter: 19mm(8 holes); 25mm(4 holes) -Our test tube rack is designed with safety and ease of use in mind, ensuring a secure laboratory environment. -Lightweight and portable test tube holder is a good accessory for any laboratory, easy to store and portable to transport. -Practical test tube rack is suitable for use in different laboratory settings, including research, clinical, and other environments. -Our test tube organizer can accommodate a range of tubes, meeting your needs . -Using sturdy materials, this sampling tube holder can withstand long period use without deformation. Package list: 1 x Testing Tube Rack