or
FILTRBOT TOP500MLCS12 .22UM500 ml Bottle Top Filter .22 cellulose acetate 45 mm neck
Corning Bottle-Top Filters Sterile 500mL 70mm diameter cellulose acetate membrane. Sterile aqueous filters in polystyrene funnels attach to glass or plastic media bottles. Vacuum line attachment. 0.22um pore size. 33mm neck size.