Triple 3x USB Module - Clear Black
Clear Black 39969
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You can use a blank plate to cover a switch or socket that's you're not using to make it safe and to protect it from dust and moisture.
They're handy if you don't want to or can't plaster over the unused outlet.
This triple blank plate is just 2mm thick, so it really is pretty invisible on the wall. We've made it from polycarbonate which is more flexible and durable than the usual acrylic.