Grainger Part #: 12K970. Syringe Filter,0.45um,25mm,PK100. Syringe Filter, 25 mm, Pore Size 0.45 um, Capacity 100mL, Filter Material Hydrophilic Polyethersulfone, Housing Material Polypropylene, Inlet Connection Luer-lok(TM), Outlet Connection Luer-slip (no