DURAN®. Class A, IN (TC) calibrated. With dated batch number. With declaration of conformity acc. to DIN 12600. With NS ground, ring mark and graduation in permanent white ceramics, acc. to DIN EN ISO 1042. Without stopper. Batch Certificate of Performance, Individual Certificate of Performance and DAkkS-Certificate (former DKD Calibration Certificate) are available on request. DURAN®. Class A, IN (TC) calibrated. With dated batch number. With declaration of conformity acc. to DIN 12600. With NS ground, ring mark and graduation in permanent white ceramics, acc. to DIN EN ISO 1042. Without stopper. Batch Certificate of Performance, Individual Certificate of Performance and DAkkS-Certificate (former DKD Calibration Certificate) are available on request.