Description_x000D_ General description_x000D_ • Ideal for culture work_x000D_ • Manufactured from Pyrex borosilicate glass_x000D_ • High resistance to attack from water reduces leaching of contaminants which can cause pH changes_x000D_ • PBT screwcaps with inert PTFE lined rubber disc_x000D_ • Cap can withstand repeated dry heat and steam sterilisation cycles (121 deg. C for 2 hours)_x000D_ Legal Information_x000D_ PYREX is a registered trademark of Corning, Inc.