Whatman 1450-042 Filter Circles, 42.5mm Dia, Hardened Low Ash Grade 50, 100/pk (PN:1450-042)
GR 50 4.25CM 100/PK
Quantitative Filter Papers - Hardened Low Ash Grade 50 circles, 42.5 mm 100/pk Retention of very fine crystalline precipitates. The thinnest of all Whatman filter papers. Slow flow rate. Hardened and highly glazed surface.
Also, check out the Ahlstrom 0540-1850 Quantitative Filter Paper, Grade 54, 185 mm
GR 50 4.25CM 100/PK
Quantitative Filter Papers - Hardened Low Ash Grade 50 circles, 42.5 mm 100/pk Retention of very fine crystalline precipitates. The thinnest of all Whatman filter papers. Slow flow rate. Hardened and highly glazed surface.
Also, check out the Ahlstrom 0540-1850 Quantitative Filter Paper, Grade 54, 185 mm
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