PMP. Class A, tolerances acc. to DIN EN ISO 1042, glass-clear, with ring mark individually calibrated to 'In'. With standard NS PP-stopper. With imprinted lot-number and batch certificate. Exposure to temperatures up to 121 °C (autoclaving) will not cause permanent exceeding to tolerance limits. To preserve markings, cleaning at no higher than 60 °C is recommended. Also available with DAkkS calibration certificate or individual quality certificate.