Material: DURAN ® glass. Autoclavable: yes. Proven DURAN ® properties Glass type I, neutral glass according to USP, EP and JP High mechanical stability Reinforced, stable rim Regular wall-thickness Autoclavable, sterilisable With retrace code Easily readable scale Fired-on highly durable labelling Notes for use: To avoid thermal stresses in the glass, uniform and slow heating of Super Duty products is recommended. When working at very high temperatures, or if rapid temperature changes are expected, standard DURAN ® beakers and Erlenmeyer flasks should be used, as these have excellent thermal shock resistance. However, their mechanical sturdiness is limited compared with the Super Duty range. Beaker DURAN ® Super Duty low form