or
25 mm GD/X Syringe Filters 0.45 um GMF sterile Sterile:Yes. Non-Pyrogenic:No. Whatman 25 mm GD/X Syringe Filters contain a unique prefiltration stack of Whatman Multigrade GMF 150 (10:1 um) and Grade GF/F (0.7 um) prefilters.