CLEAR READING LINE - The scale of the dropper pipette is very precise, clear and professional and the calibration marks are easy to read. 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 liquid in the pipette. Technical data: pipette length: 20cm; Rubber cap length: 5.5cm and width 3.5cm; Tip hole diameter: 1mm EASY TO CLEAN - you can remove the detachable pipette ball, then wash it with water and let the pipettes air dry. Cleaning and disinfection of these droppers is convenient and quick, reusable and better than plastic pipettes. WIDE USE - These calibrated glass pipettes to accurately transfer and measure liquids such as reagents, water, oils essentials, spices, etc. Scope of delivery:3 x 10 ml glass dropper pipettes