1001-918 Whatman 1001-918 Qualitative Cellulose Filter Paper 11 µm, 46 cm (500/Pack) New Laboratory Setup Savings - up to 40%, Magnetic Stirrer, Vortex Mixer, Sample Prep, Centrifuge
Whatman 1001320-DS Qualitative Filter Paper, Grade 1, 11 um, 32.0 cm (Pack of 100): Amazon.com: Industrial & Scientific
What's the difference? Whatman™ folded filter paper - Cytiva - YouTube