KX Syringe Filters are available in 0.22um and 0.45um porosities and 4mm, 13mm, 25mm and 30mm diameters. KX Syringe Filters are available in a wide selection of membranes, including Nylon, PTFE, PES, PVDF and Mixed Cellulose Esters (MCE), supporting all common sample preparation applications.