FRIGOR-BOX & FRIGOSTAFF modular sandwiched panels for commercial and industrial coldrooms made of: self-extinguishing and foodsafe certified STAINLESS STEEL PREPAINTED GALVANIZED STEEL PLASTIC-COATED GALVANIZED STEEL Polyurethane Frigor-Box Class 2 (standard). Self-extinguishing rating All of our panels are rated CLASS 2. On request CLASS 1 is available, the maximum self-extinguishing rating. The FRIGOR-BOX product range includes all types of cooling solutions.