Specification Brand : ZJchao BulletPoint1 : [Easy to Use] Convenient design helps pipettes draw liquid easily and efficiently. BulletPoint2 : [Safe Design] Each opening has a small ball for air circulation control, allowing controlled liquid absorption. BulletPoint3 : [ Material] Made of premium rubber, resistant, safe, and for long-lasting use. BulletPoint4 : [Liquid Control] Be cautious to prevent drawing liquid into the ball, ensuring precise pipetting. BulletPoint5 : [Three Openings] Suction ball features three openings with elastic rubber force to assist in liquid suction. Color : #711 ItemName : LAB RUBBER SUCTION BULB PIPETTE BALL FOR LIQUID DRAWING RED ItemPackageDimensions_Height : 6 centimeters ItemPackageDimensions_Length : 15 centimeters ItemPackageDimensions_Width : 10 centimeters ItemTypeKeyword : science-lab-pipettor-accessories Manufacturer : ZJchao Material : Rubber ModelNumber : ZJchaotb19uf6cy2 PartNumber : ZJchaotb19uf6cy2 ProductDescription : 1. Made of rubber material, resistant, and 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. 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.