Nalgene 298-9020 Polystyrene Filter， FastCap Bottle Top， 0.2 Micron， 90mm Membrane Diameter (Case of 10)<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Capacity: Up to 5L</li><li>Material: polystyrene housing with a PES membrane; housing color: blue</li><li>Membrane diameter: 90mm; pore size: 0.2µm</li><li>Universal fit eliminates the need to screw FastCap Bottle Top Filter onto glass media bottles</li><li>Fits bottle necks up to 53mm</li></ul></div><img src="http://ecx.images-amazon.com/images/I/414NqwOtYSL.jpg" noproxy>