NALGENE® DS0320 Reusable Bottle Top Filters, polysulfone; silicone O-ring; polypropylene vacuum adapter

The convenience of a bottle top filter with the cost savings of a reusable filter housing. Screw securely onto glass media bottles with 33 or 45mm neck sizes. Deep threads screw onto bottle for convenient filling and vacuum filtration without holding filter to bottle. Removable membrane support plate is designed to provide maximum flow rate and throughput. Vacuum port on lower half of assembly. Molded-in graduations available in 250 and 500mL sizes. Polypropylene tubing adapter can be stuffed with cotton for sterile venting. Accepts ¼ inch to 5/16 inch (6 to 8mm) I.D. vacuum tubing. Non-cytotoxic. Autoclavable/Graduated.