Sodium heparinized, borosilicate glass 3.3, certified conformity, with predefined breaking point for exact volume configuration, with LOT number on packaging, labelled with: usable until, CE pursuant to IVD 98/79 EC. Safe liquid handling: The openend is filled by capillary action beyond the middle to approximately the printed ring mark, residual medium on the outside of the capillary is removed and the capillary is separated through gentle pressure with the fingers. The completely filled part now contains the exact volume.