Nalgene* Sterile Filter Funnels with CN Membrane

Ideal for use with filtering flasks or manifolds. Polypropylene upper chambers with polystyrene collar are graduated at 150 ml. Particularly useful for large volume analytical applications (as long as the membrane continues to flow). Convenient snap-away design with removable membrane. Cellulose nitrate (CN) membrane is white with gray grid. Safer and easier to use than cumbersome glass and metal funnels. Each package of 12 filters contains a Nalgene vacuum gasket to replace a stopper or adapter with 9/16 in. or larger opening. Pore size is 0.45 µm with a 47 mm diameter.