The standard grid profiles (U shape) size we have: 10mm or 15mm wide, 40 mm 60mm and 80mm tall. The dimensions of grille we have 50X50, 75X75, 100X100, 125X125, 150X150, 200X200mm. 
 

Merit:
•open interspaces
•avail for dispose the ventilation & fire protection equipment
•flexible suspension system make each ceiling tiles easy install and disconnect
•surface color guarantee 10 years for indoor use
•easy to match lamps or other ceiling parts

Recommend applying in these places below:
•shopping mall, supermarket
•airport, bus station, restaurant 

Performance:
the best angle of views: 7-50 deg
 
Fire proof ability:
British Standards Institution fire test pass (BS476)