zenpore 9 cm Lab Filter Paper, Standard Qualitative Grade 4 - ZENPORE Fast Flow 90 mm (100 Discs)

Qualitative Filter Paper 9 cm Lab Filter Paper for Chemistry, Standard Qualitative Grade 4-Fast Flow 90mm(100 Discs)

Filter Paper 7 cm Lab Qualitative Filter Paper for Chemistry, Standard Qualitative Grade 2-Slow Flow 70mm(100 Discs)

Qualitative Filter Paper 24cm Lab Filter Paper for Chemistry, Standard Qualitative Grade 1-Medium Flow 240mm(100 Discs)