Those ones are what they use for Shanghai 100 B&W film, they are dreadful and I would stay away. My understanding of the weird hinge on the cassette is that the Chinese factory which makes them had no access to metalworking in order to make the normal metal caps.
I use these, they're easier to open and close:
https://www.adorama.com/blcp4.html
By the way, this forum will automatically adjust the link you put into text so it's not super long, you can put whatever length link you want.
My only caution with the ones I posted from Adorama is, you need to clean up the felt a bit and get rid of lint and loose strands, otherwise they might stick to or overlay your film when shooting. I used canned air and tweezers to get rid of the loose bits and they have worked just great.