Specification :

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Round hole perforated sheets are the most common and most requested. There are several types of hole diameters: very small, medium and large size. Hole pattern is of primary importance: the most popular arrangement is the 60 degree angle pattern, which combines a high rigidity and a decent proportion between open and full areas . The 90° pattern is equally popular, above all for aesthetic needs whereas the 45° pattern is now almost disused.
Another important technical detail to consider is the pitch ( interaxis) , which is the minimum distance between the centers of two adjacent holes.
Typical applications include:
Balustrade
Cladding
Acoustics
Speaker grilles
Screening & recycling
Shop fitting
Sunscreens
Filtration
Security for windows & doors