CLEAR READING LINE - The scale of the dropper pipette is precise, clear, and professional with calibration marks at 0.25ml, 0.50ml, 0.75ml, and 1ml for easy reading. HIGH QUALITY - Made of high-quality glass and rubber, the pipette is thick and durable. The rubber tip is thick, firm, and provides good absorption to retain liquid. EASY TO CLEAN - The black stopper on the glass pipette is removable. Rubber caps can be easily detached, allowing water to flow through the entire dropper. This enables convenient and thorough cleaning and disinfection. Reusable and more durable than plastic pipettes. VALUE PACK - Includes 20 pieces of two different shaped glass graduated pipettes with silicone caps, suitable for various applications. Ideal to use separate pipettes when handling different substances. Practical and efficient. WIDE USE - Calibrated glass pipettes are designed for accurately transferring and measuring liquids such as reagents, water, essential oils, and spices. Suitable for laboratory testing, chemistry, food research, and perfume preparation. Characteristics: