Double Rings Grade 1 Qualitative Filter Paper, Medium Filtration, 11 cm Diameter. Semi-permeable paper barrier placed perpendicular to a liquid or air flow. Commonly used in science labs to separate fine solids from liquids or air. Low ash content. This can be used to remove sand from water. Comparative to Whatman Grade No. 1. Box of 100 circles, United Scientific brand, MPN FPR011, also available. Double Rings brand, MPN 102, SKU US011

FEATURES:

• Qualitative
• Medium Filtration
• Low Ash Conent
• 100 Circles per Box
• Double Rings or United Scientific Brand