Title: not metal, but it works!
Product review: I bought my pressure cooker from a rummage sale, so I had to do a lot of research to find out what that part was called, and what model of Mirro Pressure cooker I had. When I got this in the mail, I noticed that it was not metal, but a rubber plug set into the same 'threaded fuse plug'. I initially wondered if the rubber stopper would contain the 15 psi pressure, but I have used that setting thrice since switching to the new fuse and it has performed well. Bottom-line, It is not an EXACT replacement, but I actually feel safer with this fuse than with the original. However, being rubber, I fully expect time and heat to gradually degrade it, just the same as the rubber gasket that fits between pot and lid.
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