I got a free shop vac at a garage sale. The sticker reads model 7000D. It says heavy duty - 16 gallon. I cannot find a manual for it. I want to make sure I get the correct hose. It is a large opening 2 1/2 inches give or take. I located a foam filter on it as well as a long rectangular one. There was another one or so I think that was near the rectangular one but it disintegrated in my hands. I am not sure if it was another filter or built up dust.