Condition: 100% Brand New_x000D_Item Type: Quantitative Suction Bulb_x000D_Material: Rubber_x000D_Color: Red_x000D_A Opening Diameter: Approx. 11.2mm / 0.44in_x000D_Hole Diameter: Approx. 5.7mm / 0.22in_x000D_E Opening Diameter: Approx. 12.8mm / 0.50in_x000D_Hole Diameter: Approx. 7.6mm / 0.30in_x000D_S Opening Diameter: Approx. 14.4mm / 0.57in_x000D_Hole Diameter: Approx. 7.1mm / 0.28in_x000D_Weight: Approx. 46g / 1.6oz 1Made of high quality rubber material, corrosion resistant, safe and durable to use. 2Easy and convenient to use, help pipettes to draw liquid rubber ball. 3Suction ball has 3 openings which are used by elastic rubber force to help suck the solution into the pipette. 4Be careful not to draw the solution into the ball. 5Safe 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. 6The absorption of the liquid can be controlled by the existence or absence of this interspace.1 x Quantitative Suction Bulb