Cosi Square Glass Set MThe Cosi square glass set M is suitable for the Cosibrixx, Cosiflow, Cosicube 70 and Cosiburner square. All glass sets for Cosi fire tables are made from hardened glass. That means the glass has been heated to ca. 650 degrees Celsius and then cooled again. This process makes the glass up to 5 times stronger than regular glass, and less prone to tearing and breaking. Use this glass set to protect the flames from the wind and to keep children's hands