They are of the 'Melt-blown' variety, a 'depth' filtration media...

Check out here, where I get mine from...http://www.mearesolutions.co.uk/

UK based, but I guess you must have summit similar there....

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Alastair AKA H.C.II South Wales, U.K. based member

W123, 1985 300TD Wagon, 256K,
-Most recent M.B. purchase, Cost-a-plenty, Gulps BioDiesel extravagantly, and I love it like an old dog.

W114, 1975 280E Custard Yellow,
-Great above decks needs chassis welding--Really will do it this year....