Alu-Gaufer bread sheet.Specially made for heart furnace. Special crimped aluminium alloy which prevents dough from sticking and improves the aspect of the crust. Resists freezing, heating, high humidity, fermentation, yeast and salt. excellent heat conductive material. Black anodised for better heat absorption. Use for controlled fermentation chamber and freezing chambers. easy to store due to its stackability. No retreatment needed, only slight and regular greasing.