WHATMAN 5802-320 Filter Paper,30 to 35um,32cm,PK100 WHATMAN 110616 Filter Membrane,12um,25mm,PK100 WHATMAN 6896-2502 Syringe Filter,0.2 um,Male Luer,PK50 WHATMAN 6970-2504 Syringe Filter,0.45 um,25mm,PK150 WHATMAN 1825-150 Glass Microfiber Filter,GF/F,150mm,PK25 WHATMAN 7141-124 Filter Membrane,0.45um,47mm,PK200 WHATMAN 1827-021 Glass