Similar to 4660, with a sealed-in coarse porosity fritted disc and a two–piece top allowing easier access to the contents of the funnel. The top piece is supplied with a hose connection for pressure source such as a rubber bulb. Top and bottom pieces are held firmly together by use of a pinch clamp. O–ring is FETFE. Complete unit consists of funnel body, top cap, and O–ring. Order rubber bulb and clamp separately, see CLAMP section in this catalog.