Paper made from glass microfiber 100% borosilicate without binder. Fast filtration with a keeping back of fine particles. Standard filter for determination of particle suspensions (S.P.M.) in drinking or sewage water according to European standards (EN 872) and American standards (Standard Methods 2540D). Can be used at very high-temperature. Surface weight 55 g/m², pore 1,2 ?m, thickness 270 ?m. Available in flat disks. Equivalent to: Whatman GF/C, Macherey Nagel GF-3, Millipore AP40, S&S GF52