The Büchner funnel is a well-known piece of chemical lab equipment built for filtration. The mechanism is quite simple: the funnel has either a perforated plate fitted with a paper filter or a fritted ...

Whatman 1004-110 Quantitative Filter Paper Circles, 20-25 Micron, 3.7 s/100mL/sq inch Flow Rate, Grade 4, 110mm Diameter (Pack of 100) Whatman 19 ratings ...