High Quality Materials: The main part is transparent teardrop-shaped glass, which has good toughness, is not easy to break, and is durable; The suction ring is made of high quality silicone, safe and environmentally friendly and wear resistant. ? Quantity and capacity: The set contains 1 x 5ml dropper, 1 x 10ml dropper, 1 brush, the brush can be used for cleaning, without additional purchase, to meet your different needs. ? High precision: transparent tube, easy for observation of chemical experiments, the scale on the dropper is very clear and precise, which can meet your high precision requirement. ? Easy to maintain: Use the pipette brush (included) to remove the ball to be cleaned, then dry air the pipette. reusable. ? Various uses: The dropper can be used not only for laboratory research medicine, food, biology, school, but also perfume, essential oils or other liquids. Glass Graduated Pipettes With Cleaning Brush ideal for experimental tools. Features ? Thickened solid glass, high transparency and high temperature resistance. ? Rubber suction ball, not easy to damage and durable. ? Clear graduated, easy to observe. ? Physical characteristics: high hardness, high melting point, slightly soluble in water and does not react with acid. ? The brush is made of hairless wool, with strong cleaning power, can clean the residual chemicals in the dropper, and extend the service life of the dropper. Specification