Mark. ocb. . matter. cardboard. . presentation. 25 books of 50 cardboard filters. . specificities. cardboard filter ocb virgi perforated x 25 notebooks. 1250 cardboard filters. perforated: facilitates the rolling of the filter. virgin paper (unbleached). perforated: facilitates the rolling of the filter. . dimensions. cardboard filter ocb virgi perforated x 25 notebooks. length x width (cm). 6 x 2.1cm