Scharlau's class A and class AS volumetric glassware is designed to measure volumes accurately. The range of equipment is used in the laboratory to make exact volumetric measurements of liquids. All Scharlau volumetric glassware comes with a batch analysis certificate; plus individual or ENAC-accredited and ISO 17025:2017-compliant certificates are also available.rIf you need a special piece, please request it at glassware@scharlab.com.rIf you cannot find what you are looking for, please contact us at helpdesk@scharlab.com for personalized assistance.