Very fast filter paper, especially suitable to filter coarse precipitates. - Filtration speed acc. to DIN 53137: 5 s. - Thickness: 0.22 mm. - Weight: 85 g / m². - Application: analytical qualitative. - Surface: machine smooth. - Filtering speed: very fast. Very fast filter paper, especially suitable to filter coarse precipitates. - Filtration speed acc. to DIN 53137: 5 s. - Thickness: 0.22 mm. - Weight: 85 g / m². - Application: analytical qualitative. - Surface: machine smooth. - Filtering speed: very fast.