High quality-the test tube rack is made of high-quality inert polypropylene, acid-resistant, corrosion-resistant and durable, 40 holes-each test tube rack has 40 holes with the same diameter, which can meet your needs and has good performance -Professional manufacturing, exquisite craftsmanship, beautiful and practical, can be used for a long time, used for-headspace bottles for holding samples in chemical experiments.
