<p>Armstrong Cortega Board are purchased in boxes of 16.<br><br> Technical Details<br> <ul> <li>Size: 600x600</li> <li>Quantity: 16</li> <li>Sound absorption alpha w: 0.55 (H)</li> <li>Sound absorption (NRC): 0.55</li> <li>Sound attenuation Dncw (dB): 34</li> <li>Light reflectance (%): 80</li> <li>Relative humidity (%RH): 70</li> <li>Thermal conductivity (W/m?C): 0.0562</li> <li>Fire reaction: Class 0 / Class 1 (BS 476)</li> <li>Weight (kg/m2): 3.5</li> </ul> Ceiling tiles should be stored flat in clean and dry conditions. As products may be modified or retested it's essential to check the manufacturers specifications.</p>