Appears to be a good quality rad cap. Good fit and seal looks like it is made from high grade rubber.
Made in Japan, not China or Mexico like so many other brands you get at most auto parts stores.
While this radiator cap appears to be well constructed, it was extremely difficult to install on my Honda CRV. When screwing it on to the radiator, an excessive amount of force was needed to get it started.
I may take a closer look and see if I can modify it to make it start with a little less effort. If not, I will probably junk it and get a different brand.