Taishan Magnetic

I really don't know what these are. I mean, it's a magnetic switch, and I think it should be MX plate compatible, but I have no idea who is actually making these, they kinda remind me of Cherry Viola molds. They are also unopenable as far as I can tell. They have a PC housing and UPE stem with a nice long 22mm spring. 

Initial Force: 35g

Bottom Out Force: 47g

Bottom Out: 3.5mm