These Nalgene® polysulfone (PSF) bottletop filters screw directly onto glass media bottles with 45-mm neck size. Deep threads hold the filter onto the bottles. Use with 47-mm diameter membranes. Nominal filter area is 13.3 cm² with sterilization support plate.

PSF bottletop filters feature a vacuum port, molded-in graduations, and silicone O-ring. For a sterile venting plug, put cotton in the polypropylene tubing adapter. Filters accept 1/4" to 5/16" (6- to 8-mm) ID vacuum tubing.

Warning: This product is not approved or intended for, and should not be used for medical, clinical, surgical or other patient oriented applications.