Double-walled design. Between the walls are 25-mm-thick special insulation plates according to Class A1 in accordance with DIN 4102. Protection against light fires and break-in attempts. Doors each with 3 safety bolts locking into place in the side walls. Bolt work – one lock each on bottom and top, three on the side. Double-bit safety closure including 2 keys. Shelves in 15-mm pattern height-adjustable. 4 adjustable shelves.