Whatman 1002-090 Filter Circles, 90mm Dia, Grade 2, 100/pk (PN:1002-090)

GR 2 9.0CM 100/PK
Qualitative Filter Papers - Standard Grades Grade 2 circles, 90 mm, 100/pk, Slightly more retentive and absorbant than Grade 1 with a corresponding increase in filtration time (i.e., slightly slower filtration speed). 

Also, check out the Ahlstrom 0540-1850 Quantitative Filter Paper, Grade 54, 185 mm