Bel-art h14626-3518 buchner table-top funnel with medium porosity removable plate, 18″ i.d., 11.5″h filter large volumes quickly with a polyethylene plastic table-top buchner funnel using your choice of fritware or perforated filter plate. removable hose barbed connector accepts 12.7mm (1/2″) i.d. Tube and threads into 3/4″ npt bung on the funnel fixed or removable fritware porous filter plates supported by a multiple ring grid; hdpe, 6.4mm (1/4″) thick, with a non-porous ring at the periphery of the plate which seals filter paper when used fritware porous filter plates available in two porosities (medium and coarse); medium is 45-90 microns while the coarse is 90-130 microns; use temperature range maximum 52c (125f), minimum -80c (-112f) fixed or removable perforated filter plates are made of 4.8mm (3/16″) thick hdpe with 4.8mm (3/16″) perforations on 11mm (7/16″) centers perforated filter plates available in two versions (fixed or removable); fixed for coarse filtration or use with a cloth or paper filter; removable for use in precious metals recovery; use temperature range maximum 52c (125f), minimum -80c (-112f) use the f36820-0118 funnel trowel to quickly and efficiently smooth fissures appearing during the filtration process