Perforated sheets have a very broad function. They can also sieve, filter, let air through, protect, screen, aerate, etc.
The round perforations (R = diameter) are standard in equilateral triangle distribution (T = pitch distance measured from the centre of the holes), e.g. R5-T8.
The square perforations (C = side) are in square distribution (U = the pitch distance measured from the centre of the holes), e.g. C10-U12.
Dejond can also supply expanded metal, woven mesh, printed woven or spot welded mesh at very short notice in aluminium, stainless steel, bright steel or galvanised steel.