MGO ceiling board could be perforated with bunch of holes like round, oval and square.
Popular dimension of holes like 6/18, 6/25, 8/18, 8/20, 8/25.
Structure
Top side like white paint rolling treatment or laminated with PVC.
Back side of this panel usually being laminated with non-woven fiber for fulfilling purpose of noise barrier.
Holes
Holes like 6/18, 6/25, 8/18, 8/20, 8/25
