Features Premium Material - This pipette filler is made of natural rubber, corrosion resistant, safe and durable to use. Perfect Lab Assistant - Our rubber suction bulb is suitable for industrial and mineral laboratories, agricultural laboratories, food laboratories, chemical laboratories, etc. Good working performance - large suction force, not easy to crack and liquid is not easy to rush. Practical Accessory - The rubber suction bulb can be used with a pipette, a good laboratory assistant. Three Valves - The suction ball has three valves which are used by the force of elastic rubber to help suck the solution into the pipette. Specification: Material: Rubber Weight: 47g/1.7oz Color: red, green (optional) Size: 13*6*6cm/5.1*2.4*2.4 inches List of packages: 1 x Rubber Suction Bulb Note: 1. This product is for single use. 2. Products should avoid leaching from rain and snow, should be kept clean, prohibit contact with acid, alkali, oil, organic solvent and other substances, and the distance from the heat source to 1.5 meters. 3. This product should be stored in a dry, ventilated warehouse, the temperature is 0-35 ° C, the relative humidity does not exceed 80%, and the soil 0.3 cm above. 4. The validity period of this product is five years according to the above conditions. Package List