High Quality - Pipettes are made of borosilicate glass+rubber, non-toxic and odorless, thick and durable. If transport damaged, please contact us for a FREE REPLACEMENT with show the defective photos. NOTE - When adding the liquid, the dropper is just above the vertical. After drawing the liquid, the tip can not touch other objects, so as to avoid contamination of impurities. Package Including - 6 pieces Glass Pipettes 0.5ml + 1ml + 2ml + 3ml + 5ml + 10ml + 2 nylon brushes. Eco-friendly and Reusable - The dropper is made of glass with corrosion resistance and also reusable. Can be used again after being cleaned up. Multiple Use - Perfect for receiving and dispensing liquids.Apply for testing laboratories, chemistry, microbiology, liquids, scents etc.