Glass fibre filter paper - round filters, type GF 6, Ø 25 mm, 200 unit(s)Glass fibre filter paper round filters, type GF 6, 25 mm Material: borosilicate glass (fibres), inorganic binding agent. Chemically resistant to the majority of organic and inorganic solvents, aggressive chemicals and highly concentrated bases (not resistant to hydrofluoric acid) Constant weight, negligible influence on fluctuations in ambient humidity Mechanically stable (limited bending resistance) Note: filter units and clamping fixtures must have