DURAN®-Super Duty narrow neck Erlenmeyer, 25 ml, flask outer Ø 42 mm, H 75 mmDURAN Super Duty narrow neck Erlenmeyer, 25 ml, flask outer 42 mm, H 75 mm 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