Suction head - also known as gun head, pipette nozzle, is a disposable consumable, used in any molecular biology and genetic research applications, its effective formation of a protective structure between the pipette and the sample to ensure the safety of suction and sample separation. Capacity range from 10-5000ul. Generally divided into: sterilization and non-sterilization two. However, according to the application scenario, it can be divided into: 1. Conventional suction head 2. Filter core suction head 3. Low adsorption suction head 4. Automatic suction head 5. Stacked box suction head (can only do no filter) 6. Combined box suction head (divided into: five combined and two combined boxes)

A good suction depends on concentricity, taper, and the most important point is adsorption.