A great value, high performance ceiling tile. The lightweight stone wool composition of this product creates outstanding performance in the areas of sound absorption, humidity resistance and reaction to fire. The clean, modern finish of this product make it a great option for Offices, Schools, Retail and high humidity environments. This 600 x 600mm ceiling tile suits a 24mm (standard) grid. Properties Tile length: 595mm. Tile width: 595mm. Tile thickness: 15mm. Ceiling grid: 600mm x 600mm x 24mm. Edging: square edge. Box quantity: 32x tiles. Box coverage: 11.52m2. Sound absorption: 0.80w / 500 Hz. Class B. Reaction to fire: A1. Light reflection: 85%. Fire protection The fire resistant properties of stone wool ensure ROCKFON ceiling tiles provide fire protection in construction. The fire protection properties of ROCKFON ceilings have been tested and classified in accordance with European norm EN 13501-2 and/or national norms depending on requirements in national building codes. Some sizes and edge details of ROCKFON Artic can be used with various Chicago Metallic grids and ROCKFON systems to create a 30 minutes fire protecting ceiling in accordance with BS 476 Part 21 and Part 23. They can also be used to create a 30 minutes fire protecting membrane ceiling (integrity only) in accordance with BS 476 Part 22.