Disposable capillary pipettes, sodium heparinized, end-to-end, borosilicate glass 3.3, certified conformity, with LOT number on the packaging, labelled with: usable until, ISO 7550, CE pursuant to IVD 98/79 EC. In conjunction with the shortened length of 30 mm, disposable capillary pipettes are especially suitable for Delbrück method applications.