Polysulfone (PSF) bottle-top filters with silicone O-Ring

Can be autoclaved repeatedly, intended for use with threaded 33 or 45 mm dia. media bottles. Suitable for pressure and vacuum filtration up to 0.6 bar. Non-breakable, non-toxic. Includes seal, cap and tubing adapter made of polypropylene. 2 filter upper sizes available (250 or 500 ml), which accept 47-mm or 50-mm membranes.