Conformity certified, with batch number and enclosed batch certificate.
Boro 3.3, DIN EN ISO 1042. Calibrated to contain (In). Ring marks and inscriptions in ETERNA amber stain (particularly resistant, e.g. for agressive cleaning methods). With PP stopper. Original packs of 2 (from 1000 ml on 1 piece), including batch certificate. On request, also available with individual certificate or DAkkS calibration certificate.