Description_x000D_ General description_x000D_ To avoid thermal stressing of the glass, uniform and slow heating of super duty products is recommended._x000D_ When working at very high temperatures, or if rapid temperature changes are expected, standard beakers and Erlenmeyer flasks should be used, as these are characterized by excellent thermal shock resistance._x000D_ However, the mechanical sturdiness of standard products is limited compared with the super duty range._x000D_ • Increased mechanical sturdiness due to increased uniform wall thickness_x000D_ • Reinforced, sturdy rim_x000D_ • Type 1 glass_x000D_ • Autoclavable/sterilizable_x000D_ Legal Information_x000D_ DURAN is a registered trademark of DWK Life Sciences