I bought this used from a member awhile back. Can't ID the manufacture, all it had was an SFI sticker. Still has crosshatch pattern on the steel insert. 180 tooth, I had it zero balanced by my machine shop. Made for a diaphragm style clutch, wont work with long style, which is why I couldn't use it. Accepts clutch size from 10" to 12". $275.00 obo plus shipping from NC 27053.