Feature:1. Made of high quality rubber material, corrosion resistant, safe and durable to use.2. Easy and convenient to use, help pipettes to draw liquid rubber ball.3. Suction ball has 3 openings which are used by elastic rubber force to help suck the solution into the pipette.4. Be careful not to draw the solution into the ball.5. Safe in the opening of each ball has a small ball in the rubber tube, as long as the side of the ball can be pressed between the ball and rubber tube to form gaps between the air and out.6. The absorption of the liquid can be controlled by the existence or absence of this interspace.Specification:Condition: 100% Brand NewItem Type: Quantitative Suction BulbMaterial: RubberColor: RedA Opening Diameter: Approx. 11.2mm / 0.44inHole Diameter: Approx. 5.7mm / 0.22inE Opening Diameter: Approx. 12.8mm / 0.50inHole Diameter: Approx. 7.6mm / 0.30inS Opening Diameter: Approx. 14.4mm / 0.57inHole Diameter: Approx. 7.1mm / 0.28inWeight: Approx. 46g / 1.6ozPackage List:1 x Quantitative Suction Bulb