At your local discount store, you should be able to find some fairly large scouring sponges, I've found that these work adequately as filters, provided you put a layer of porous cloth over the downstream side to catch the finest particles. If you're fortunate enough to find the really fine ones, the cloth isn't needed. These come in 1/4" thick postcard-sized sheets, which I usually cut up anyway, so give these a try and see if they meet your needs. Dick -----Original Message----- From: Lawrence LeMay <lemay(a)cs.umn.edu> To: Discussion re-collecting of classic computers <classiccmp(a)u.washington.edu> Date: Saturday, April 10, 1999 2:33 PM Subject: source for foam filter material >Does anyone know where I might be able to buy some thin black foam filter >material, to replace the stuiff that was used on my Teral computers? >These systems have a large fan that draws air into the computer, and >the intake air goes through this very thin filter, in order to capture >large particles such as lint. > >After 22+ years, that foam is nothing more than dust. > >I would need something almost 5 inches wide, that i could then trim to >the proper shape. > >-Lawrence LeMay