Made of high-quality plastic material, not easy to wear and break, can serve you long time. Can be reused, and easy to clean. Perfect for laboratory, provide a practical of the tube contents and convenient insertion and removal of tubes. Also suitable for storing . Features - ColorTransparent - Material: Plastic. - Size: 16.00X8.50X5.00cm/6.29X3.34X1.97inch. - It is made of and safe plastic materials with excellent texture and durability. - Comes with pretty quantity holes, perfect for holding the corresponding test tubes. - Also great for holding gumballs, treats, candy, pens and other small stuff. - Suitable for use in scientific research, industrial and mining enterprises and colleges and other laboratories. - and light weight, easy to carry and store, won't take up too much space. Package list: 4 Tube Racks