Filter Apparatus C-13050Complete with filtering flask, rubber cork with hole, glass adapter, rubber cone and gooch crucicble with sintered disc of porosity G-1 or 2 or 3 or 4Filter Apparatus C-13055Complete with filter flask with socket and Buchner funnel with integral sintered disc of porosity G-1 or 2 or 3 or 4 having cone.Membrane Filter Holder Assembly C-13060With sintered disc support for membrane, funnel, flask and clamp. Standard joint fittingMembrane Filter Holder Assembly C-13065With sintered disc support for membrane, funnel, flask and clamp. Neoprene rubber cork fitting