Universal tip compatibility Compatible with the great majority of the pipette available in the market. Wide variety The Expell bulk, racked or racked-sterile tips are available on all sizes to cover all your pipetting needs: 10ul, 10ul long, 200ul, 300ul, 1000ul, 5ml and 10ml. High quality finish Made to scientists who value the importance of achieving great accuracy and precision at their work, the Expell tips are manufactured out of extremely high quality molds, leading to no compromise on the quality of their research work.