Class A. DURAN®. IN (TC) calibrated. With dated batch identification. With declaration of conformity acc. to DIN 12600. With NS-ground and poly stopper. High-contrast blue graduation. Batch Certificate of Performance, Individual Certificate of Performance and a DAkkS-Certificate (former DKD Calibration Certificate) are available on request. Class A. DURAN®. IN (TC) calibrated. With dated batch identification. With declaration of conformity acc. to DIN 12600. With NS-ground and poly stopper. High-contrast blue graduation. Batch Certificate of Performance, Individual Certificate of Performance and a DAkkS-Certificate (former DKD Calibration Certificate) are available on request.