250ml,24/40,Glass Buchner Funnel With 68-70mm Pore plate,Lab Glassware 1, Buchner funnel,250ml 2, Diameter 68-70mm Pore Plate,Pore diameter is 2mm. 3, With 10mm hose connection, 4, Material: borosilicate glass 3.3, 5, Joints size: 24/40