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
Maximum pore size: 10~15 µm
Filtration speed: Ash Content: Basis Weight 80 +/- 4
Located in Waterloo Ontario. Open Mon-Fri from 9:00 to 4:30 pm.