The ringcaps® are disposable capillary pipettes with ring mark manufactured by Hirschmann Lab. These pipettes are made of borosilicate glass 3.3. It has a batch number on the packaging and is marked with expiration date, ISO 7550, and CE according to IVD 98/79 EC. Furthermore, it is offered in various microliter capacities ranging from 1-5 up to 50 µl.