DURAN® volumetric flasks are used for the accurate measurement of specific quantities of liquids. They are volumetric analysis aids in quantitative laboratory work. These volumetric flasks are certified according to USP and are marked with an individual number.– Complies with ISO 1042 – Calibration based on the poured in volume (“In”) at a + 20 °C reference temperature – Outstanding precision during volumetric measurement and high-quality process stability – Thanks to the exact processing and precisely calibrated scales, they permit the highly accurate determination and measurements of volume – Supplied with ergonomic polyethylene stopper for easy and safe tightening or removal – The volume content tolerances conform to accuracy Class A – Fired-on, highly durable blue print – With printed ring mark for better visibility – Influence of undesirable factors is kept to an absolute minimum DURAN® volumetric flasks are used for the accurate measurement of specific quantities of liquids. They are volumetric analysis aids in quantitative laboratory work. These volumetric flasks are certified according to USP and are marked with an individual number.– Complies with ISO 1042 – Calibration based on the poured in volume (“In”) at a + 20 °C reference temperature – Outstanding precision during volumetric measurement and high-quality process stability – Thanks to the exact processing and precisely calibrated scales, they permit the highly accurate determination and measurements of volume – Supplied with ergonomic polyethylene stopper for easy and safe tightening or removal – The volume content tolerances conform to accuracy Class A – Fired-on, highly durable blue print – With printed ring mark for better visibility – Influence of undesirable factors is kept to an absolute minimum