Polyethersulfone (PES) is the ultimate tissue culture membrane. It's fast and clean. PES is low protein binding so there is less chance of removing critical protein components from your media. It is hydrophilic so no external wetting agents or surfactants are needed, resulting in low extractables. And it's fast, so you spend less time waiting.

Fewer Extractables
Low Protein Binding

Capacities: 150ml, 250ml, 500ml and 1000ml.
Pore sizes: 0.2µm and 0.45µm.
Membrane diameters: 50mm, 75mm and 90mm.

NALGENE MF75 Filter Units with PES Membrane

Capacity	Pore Size	Membrane Diameter	No. Per Case	Nalgene Cat. No.
150ml	0.2µm	50mm	12	165-0020
150ml	0.45µm	50mm	12	165-0045
250ml	0.2µm	50mm	12	168-0020
250ml	0.45µm	50mm	12	168-0045
500ml	0.2µm	75mm	12	166-0020
500ml	0.45µm	75mm	12	166-0045
500ml	0.2µm	90mm	12	169-0020
500ml	0.45µm	90mm	12	169-0045
1000ml	0.2µm	90mm	12	167-0020
1000ml	0.45µm	90mm	12	167-0045

NALGENE MF75 Bottle Tops with PES Membrane

Capacity	Pore Size	Membrane Diameter	Fits Bottle Neck Size	No. Per Case	Nalgene Cat. No.
150ml	0.2µm	50mm	33mm	12	296-3320
150ml	0.45µm	50mm	33mm	12	296-3345
150ml	0.2µm	50mm	45mm	12	296-4520
150ml	0.45µm	50mm	45mm	12	296-4545
500ml	0.2µm	75mm	33mm	12	295-3320
500ml	0.45µm	75mm	33mm	12	295-3345
500ml	0.2µm	75mm	45mm	12	295-4520
500ml	0.45µm	75mm	45mm	12	295-4545
1000ml	0.2µm	90mm	33mm	12	297-3320
1000ml	0.2µm	90mm	45mm	12	297-4520

Other Membrane Types:

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