CLEAR READING LINE - The scale of the dropper pipette is very precise, clear and professional and the calibration marks are easy to read. which are marked with 0.25ml, 0.50ml, 0.75ml and 1ml. HIGH QUALITY - The pipette is made of high quality glass and rubber, thick and durable, the rubber tip is very thick and firm and has good absorption to keep the liquid in the pipette. EASY TO CLEAN - The black top of the glass parison is removable. The rubber caps can be easily removed and water can flow through the entire pipette dropper. Cleaning and disinfection of these droppers is convenient and quick, reusable and better than plastic pipettes. HIGH PRICE PERFORMANCE - A total of 20 pieces, 2 different shaped glass graduated pipettes with silicone caps , perfect for your different needs. When you mix several substances, eachMaterial has its own pipette. Convenient and fast. WIDE USE - These calibrated glass pipettes for accurately transferring and measuring liquids such as reagents, water, essential oils, spices, etc. for test labs, lab chemistry, food research, perfumes, etc. Characteristics: