Volumetric flasks made of PFA, highly transparent. The tolerances comply with class A according to DIN EN ISO 1042. With individually adjusted ring mark, high temperature and chemical resistance. PFA-screw cap, closes tightly to protect from contamination. Autoclave up to 121°C (20 minutes) does not result in permanent exceeding of tolerance limit. In order to prevent graduation from damage, we recommend a cleaning temperature of max. 60°C.