Nest Scientific polycarbonate (PC) Erlenmeyer Shaker Flasks are ideal for culture bacteria and growing suspended cell cultures. This line offers flat bottoms which are gentler on cells than baffled bottoms. They also feature hydrophobic 0.22um membranes in the caps for sterile gas exchange. Vented caps are ideal for cell cultures that need to exchange carbon dioxide to reach the right pH. The polycarbonate material allows these flasks to be autoclaved and reused 5-6 times. The vent caps are not autoclavable, but sterile replacement caps can be purchased separately. 
Product features:

• 250mL
• 1 per sterile bag, 12 flasks per case
• Polycarbonate (PC)
• Flat bottom
• Vented cap for sterile gas exchange
• 0.22uM Hydrophobic PTFE membrane
• Flask reusable 5-6 times, can be autoclaved
• Vent caps not autoclavable

Affordable quality you can rely on:

• USP Grade VI polycarbonate flask
  
• USP Grade VI polypropylene cap
• Produced in ISO 13485:2016 and ISO 9001 facility
• Molded and packed in ISO 7 cleanroom
• E-Beam sterilized and lot tested to SAL 10^-6 to ISO 11137
• Lot tested free of pyrogens USP 85
• Lot tested free of cytotoxins/pyrogens  In Vivo USP 88 and In Vitro USP 87
• Lot tested free DNase/RNase and DNA 
• Lot tested free BSE/TSE
• Certified free of animal products