Open cell ceilings lay-in system Type METALSCREEN “COKI-B15” prepainted aluminium corrosionproof incombustible class “0” - Euroclass fire reaction A1. (colour and mesh cells dimension choosed by the consultant). The Type METALSCREEN “COKI-B15” open cell must have “U” shaped section width mm.15xH38,5 - mm.15xH48,5 to became a panel mm.600x600 complete of the lateral edge cover profile in aluminium same colour as the open cell panel. It will be installed lay-in on exposed T bar system “TWIN LOCK” mm.600x600xH38 with the base mm.15 of the same colour of the cell ceilings to abtain the perfect aesthetical result without any joint or visual interruption. Each panel must be easily removable for inspections. The peculiarity and particularly is to obtain a lay-in open cell ceiling without differences between the panels and the T bar system that must be of the same module width mm.15. To obtain better soundproofing, the “U” shaped blades con be microperforated Ø mm.2 with acoustic “TNT” non woven sticked on the back.