The nanoparticles are layered like an onion, but each layer is formed of a different material and has a varying thickness.

The nanoparticles are layered like an onion, but each layer is made of a different material and has a different thickness.

The nanoparticles are layered like an onion, but each layer is made of a different material and has a different thickness.

The first metal-semiconductor film has a first thickness and the second metal-semiconductor film has a second thickness that is different from the first thickness.

As such, the connector can accommodate a mating connector of a first thickness or a mating connector of a second, different thickness.

The device is further configured so as to, if necessary, apply a plurality of layered coats, each layered coat being of a different coating material, and if appropriate, different thickness.

Each half may independently have a layer which is made from a different material or different density or thickness in the case of a foam layer from that of the other half, according to two differing user preferences.