Perforated metal with round perforation.
4k textures, seamless. 6 types of perforation. Materials assigned to planes 1 x 1 m.
UVWmap is not unwrapped. Metal - channel 1, wear - channel 2 - size can be adjusted to prevent dirt from tiling.
CoronaLegacyMtl - requires CoronaRender version 1.5 or higher
CoronaPhysicalMtl - requires CoronaRender version 7 or higher
In the render - Corona Physical.