Clips PCS3 extra - box 100 pieces including screws - extra sturdy clips for mounting larger 8mm, 10mm and 12mm MDF boards (Avanti Pro 12, Pan O'quick XL and XXL). In rooms with higher humidity (eg in bathrooms or new constructions) the Pan O'quick XL and XXL panels must be fixed with PCS 3mm clips to allow expansion of the panels. About 8 clips are required per m2.