I used this 3" gasket to connect a 3" downpipe to a 3" exhaust on my Subaru. This should fit most standard 2 hole 3 inch mechanical tubing. The quality is very good and definitely metal when attached to our magnetic garage screw holder during installation. The thickness is probably more than a dime (I didn't measure it before installing, sorry). I don't expect this gasket to fall apart like the original gasket that fell off the stock exhaust when replacing it.
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