Features: Made of high-quality plastic materials, practical and durable. 50ml, they are designed to have longer length screw caps to prevent leakage. Plastic centrifuge tubes also include a convenient white writing patch for easy marking and identification. Our plastic centrifuge tubes are general used in fields of bio, such as separation and preparation of various biological samples. 50x/set round bottom centrifuge tube, adequate quantity can meet your daily use and replacement demands. Specifications: Material: Plastic Capacity: 50ml Package Includes: 50x/Set Centrifuge Tubes Note: Please allow 1-2cm errors due to manual measurement. Due to the difference betweeen different monitors,the pic may not reflect the actual color of the item.