1 ml glass graduated pipette: Is easy to see through, 0.25 ml, 0.50 ml, 0.75 ml and 1 ml scale clearly marked,making it easy and accurate to measure out oil and liquid. Dropping Pipettes: The are made of high luster glass and durable rubber bulbs, clear color provides good observation during operation, make drops precise; washable and reusable, better than plastic pipette. Easy to Use & Clean: Pinch the rubber cap to let inside air out, release to fill liquid, and pinch to let the liquid out. The black rubber caps can be removed and then rinse glass pipette stems with warm water. Wide Usages: The glass graduated droppers can be applied to transfer various liquid, essential oil, medicine, pigment etc. Package: 20 pieces 1 ml pipettes dropper, enough to meet your various demands. The dropper pipette is 7.6 cm /3 inch long, rubber cap is 3 cm/1.18 inch long, help to pick up more and pull liquid out of bottles.