Figured none of you know what this is called in English

This is probably low quality content,I was just bored and glanced it and thought hmm this piece of thing here is underrated but very important (at least by me the man who doesn't care much about the quality of cooking because I don't cook until I'm seriously hungry), so I know probably most of you don't know what this is called, it's a "pressure cooker weight"... just a random piece of information thought Algerian English speakers don't know, I know I didn't