The Filter Papers are compatible with all Infinity Filter systems and provide an economical solution for general-purpose filtration. Supplied in 100-count packs and available in 25 µm, 11 µm, or 2.5 µm ratings, these standard filter papers contain no integrated filter aids and are best used in staged filtration—25 µm for bulk particulate removal, 11 µm for intermediate clarification, and 2.5 µm for final polishing.