New and unused these connectors in a tatty box have been sat on a shelf for too long (leftover from a house rewire that had some special purpose radials).

These are original MK quality items.

5 off plug tops type 505

1 off 5A socket (not sure what part number)

AI description by ebay (its a bit weird!)

The MK 5A Plug Tops are a bundle of 5 original OS 505WHI plug tops, along with 1 free new socket. These plug tops, branded by MK, are designed for a maximum input current. Ideal for DIY electrical projects in the home, these plug tops and socket offer a convenient solution for connecting electrical devices. The included socket provides added value for customers looking to expand their electrical supply options.