BLAUBRAND®, class A, with ring marks at major graduations. DE-M marking. Boro 3.3. DIN EN ISO 4788. Calibrated to contain (TC, »In«). With PP-stopper and hexagonal base. Marks and inscriptions in high contrast blue enamel. Height = overall height without stopper. BLAUBRAND®, class A, with ring marks at major graduations. DE-M marking. Boro 3.3. DIN EN ISO 4788. Calibrated to contain (TC, »In«). With PP-stopper and hexagonal base. Marks and inscriptions in high contrast blue enamel. Height = overall height without stopper.