Graduated Dropper Pipettes with Rubber Caps 4 Pack What you get 4 x Dropper Pipettes and 4 x Rubber Caps, designed to be used together for transferring liquids safely and accurately. Key benefits Precise liquid transfer: clear scale lines with a minimum division of 0.1 ml allow you to measure and dispense volumes accurately. Durable and reusable: made from thick borosilicate glass, offering temperature and corrosion resistance for repeated use. Complete cap system: rubber caps provide strong suction to absorb liquids and are detachable for easy cleaning, replacement, and storage. Clear visibility: transparent borosilicate glass with easy to read graduations aids precise measurements. Specification Pipette Capacity: 20 ml Pipette Diameter: 12 mm / 0.47 inch Pipette Length: 410 mm / 16.1 inch Minimum Division Scale: 0.1 ml Material: Borosilicate Glass, Rubber Color: Clear Package List: 4 x Dropper Pipettes, 4 x Rubber Caps Material and design notes Borosilicate glass construction provides thickness and durability for repeated use. temperature and corrosion resistance suit a range of lab applications. Clear, readable scale lines on the pipette surface support precise liquid measurement. Rubber caps offer strong suction for efficient liquid uptake and are detachable for cleaning and storage. Instructions for use 1. Clean the pipette and blot the tip inside and outside with filter paper before use. 2. Place the rubber cap sleeve onto the mouth of the pipette and fix it. 3. Submerge the pipette in the liquid container and squeeze the rubber cap to absorb the solution. 4. After suction is complete, squeeze the rubber cap again to release the solution. 5. Clean the pipette immediately after use. Use scenarios Chemistry and material science: measure and transfer solvents or reagents during synthesis or experimental procedures. Microbiology and biology labs: aliquot reagents, dyes, or culture media with controlled volumes. Teaching labs: demonstrate accurate liquid measurement and handling to students using a reliable, reusable tool.