Funnel has sealed-in glass fritted disc with different porosity.

• Filter paper or membranes cannot withstand the chemical attack of the filtrate
• It is constructed with heavy wall stems and the top of the funnel is beaded for additional strength
• Fine frit (4 to 5.5 µm): filtration and extraction
• Medium frit (10 to 16 µm): filtration and extraction
• Coarse frit (40 to 60 µm): gas dispersion, gas washing and absorption, coarse filtration
• Extra coarse frit (170 to 220 µm): gas dispersion, gas washing and absorption, coarse filtration