This is a 4 gang polished brass Victorian LED dimmer.
We also have a number of different dimmer modules and swap outs if you're looking to mix different modules on one plate, please see our dimmer spares here
If you're looking to use a dimmer on a 2 way system, please note, 2 dimmers will not work together as this will cause a conflict in the circuitry. A dimmer will only work on a 2 way circuit if a standard rocker switch is being used on the same circuit.