The Petra Mineral Fiber Ceiling Tile is an evolution of the renowned mineral fiber ceiling tile.The project friendly price point makes the Petra Mineral Fiber Ceiling Tile an attractive option for customers on a tight budget. The Petra Mineral Fiber Ceiling Tile boasts all the advantages that you expect from a mineral fiber ceiling tile. Class A fire rating, as well as industry standard noise reduction. The tiles advanced construction utilizing recycled materials while still meeting ASTM D5116 with the highest air quality standards. The 5/8" thickness facilitates insulation batting on top of the tile without sagging. Designed to fit all standard 15/16" grid systems. Will not fit in a 9/16" grid, please measure the visible width of your grid. Available in 2x2 and 2x4 sizes.