Easy to absorb the liquid,please refer to the following picture. You can hold the pipette and push the top of the pipette to absorb the liquid which you want. and you can release the top of the pipette and put the liquid down on the lebes when you work with the microscope. 100% new & high quality Material: Plastic Color: Transparent size: 15.5cm/6.1 inch Dia. : 1.2cm/0.47 inch Volume:3ml Package content:20 x Disposable Plastic Eye Dropper Set Transfer Graduated Pipettes Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm. New and high quality. And it graduated 3ml. They're clean, Chemically Inert and non- for the environment. This transfer pipettes made from Low Density Polyethylene. Suit for Lab,testing chemistry, microbiology and all work for biology or sciencetific research etc.