This is the complete one piece seat belt buckle cover which comes with the face plate (with the round cutout for the push button) and the bezel all in one. This version is handy when you don't want to deal with multiple parts (as is the case with the separate face plate and bezel version). Simply remove your old cracked or broken cover, replace the metal spacer, and pop this cover into place and you're ready to go!
You can use your existing spacer, or if you're missing one, you can find it here.
Keep in mind that although these covers usually have a soft spongy dampener inside the cover, these covers might be missing this item due to the fact that they have been in use for up to 46 years!
Check out this video