Whatman Grade 42 Quantitative Filter Paper | General Laboratory Supply, Inc.
Whatman Quantitative Filter Paper, Ashless, Grade 42, 24 cm 1442-240 (Package of 100 Circles): Amazon.com: Industrial & Scientific
1442-150 - Grade 42 Ashless Filter Paper For Instrumental Analysis, 150 Mm Circle - Whatman Quantitative Filter Papers, Ashless Grades (ash 0.007%), Grade 42, GE Healthcare - Pack Of 100 on Galleon Philippines