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FW-407
Whatman #4 filter paper, 7.0 cm diameter
FW-409
Whatman #4 filter paper, 9.0 cm diameter
FW-411
Whatman #4 filter paper, 11.0 cm diameter
FW-412
Whatman #4 filter paper, 12.5 cm diameter
FW-415
Whatman #4 filter paper, 15.0 cm diameter
FW-418
Whatman #4 filter paper, 18.5 cm diameter