Plastic volumetric flasks are an excellent break-resistant alternative to glass. Available in crystal clear PMP, these volumetric flasks are calibrated “to contain” and meet Class A tolerances per DIN EN ISO 1042. Supplied certificate includes mean test value and lot (lot and year are imprinted on product). Thermal stress up to 121°C (autoclaving) does not cause permanent exceeding of the tolerance limits. However, to preserve markings, cleaning at no higher than 60°C is recommended.