Whatman 1004-042 Quantitative Filter Paper Circles, 20-25 Micron, 3.7 s/100mL/sq inch Flow Rate, Grade 4, 42.5mm Diameter (Pack of 100)

4.25cm Grade 4 Used in qualitative analytical techniques to determine and identify materials Extremely fast filtering

provides excellent retention of coarse particles (20-25µm) and gelatinous precipitates such as ferric hydroxide and aluminium hydroxide Used when high flow rates in air pollution monitoring are required and the collection of fine particles is not critical

Is Discontinued By Manufacturer: No Product Dimensions: 1.8 x 1.8 x 0.9 inches; 0.16 ounces Item model number: F1060-1 Date First Available: February 26, 2009 Manufacturer: Whatman ASIN: B00394F9O6