Nalgene® Filter Funnels
ThermoFisher Nalgene® Single-Use Disposable Filter Funnels are offered with different membranes for various applications and are easily identified by their collar color.
- PES (Polyethersulfone) - blue collar: The ultimate cell and tissue culture media membrane. Low protein binding, low extractables, no external wetting agents, fast flow.
- SFCA (Surfactant-free cellulose acetate) - yellow collar: Much cleaner than standard cellulose acetate. Low protein binding, no wetting agent. A Nalgene® product exclusive.
- CN (Cellulose Nitrate) - green collar: The standard membrane for filtering of buffers and solutions.