I'm not sure what to call these things, but they are the covers for
electrical boxes. There are a total of six covers, two with 2 RJ-45
connectors and four with 1 RJ-45 connector. Each of the RJ-45 connectors
have 8 pins, and these are the covers used when wiring up a
house/office/??? for a network. $5.00 plus shipping for all.