Ø250×60 mm filter pan made of steel and consisting of two pieces; the body and its top cover Together with one 1000 ml or 2000 ml water collecting glass vessel (erlenmayer) and vacuum hoses 100 pcs 40×40 cm white filter paper. Ø 340 mm diameter 2 pcs under filter cloth. Ø 240 mm diameter 2 pcs under filter wire wowen screen mesh 1 mm square apertured Double-Stage Vacuum Pump 10.0 m3/h suction, At 20° C in closed gas ballast 0.00002 bar = 0.02 mbar vacuum,