400 multiway plugs 4 to 1 uk plug known as hydra,suit reseller going cheap

These lot are for sale for a friend (sadly now blind so has no use for them) who originally invented & held the patent for them too! all brand new boxed individually in 5 boxes of 80
They are surge protected though this part could be removed simply for purists.

Specifications:
Current rating 13A 3120 watts (max) @ 250Vac Dimensions 90 x 50 x 35mm (same width as a standard UK plug).Ideal for hifi audio/visual computer kit etc

Conforms to BS5733
Surge protect version which protects A/V hifi computer etc equipment from surges & spikes in electricity supplies
Fused at 13A
Cables clamp with solid brass bars for connections via screw terminal

Neon indicator light

looking for £800 plus postage via courier £50 (5 separate parcels).

 

Now on ebay.