1?��Each test tube has a cover, which can effectively prevent contamination between samples and ensure the accuracy of the experiment. 2?��EP material plastic, can be used for many types of sample testing. 3?��High quality plastic, good toughness, not easy to deform. 4?��0.2ml, 2ml, 10ml three different capacity products are available, can be purchased as needed. 5?��Easy to use, very good laboratory supplies. Feature: Each test tube has a cover, which can effectively prevent contamination between samples and ensure the accuracy of the experiment. High quality plastic, good toughness, not easy to deform. 0.2ml, 2ml, 10ml three different capacity products are available, can be purchased as needed. EP material plastic, can be used for many types of sample testing. Easy to use, very good laboratory supplies. Specification: Material: EP Plastic Each capacity: 2ml; 0.5ml; 10ml (Optional) Package list:(Optional) Package(2ml capacity): 500 * Centrifuge Tube Package( 0.5ml capacity) 1000 * Centrifuge Tube Package(10ml capacity) 200* Centrifuge Tube Note: The actual product color may deviate from the photo due to light. There may be a slight deviation in the measurement of product.