These are Qualitative Filter Paper, Grade 103, with 100 circles in each package. The size of this filter paper is large (125 mm, 12.5 cm) Type: Qualitative Filter Paper Speed: slow Grade: 103 Maximum pore size: 10~15 ┬Ám Filtration speed: Ash Content: Basis Weight 80 +/- 4 LL-PF1000103S-100