Description General description • Ideal for culture work • Manufactured from Pyrex borosilicate glass • High resistance to attack from water reduces leaching of contaminants which can cause pH changes • PBT screwcaps with inert PTFE lined rubber disc • Cap can withstand repeated dry heat and steam sterilisation cycles (121 deg. C for 2 hours) Legal Information PYREX is a registered trademark of Corning, Inc.