The Bertrams VLE 17WFD120 is a double-wall wall covering measuring 120 cm in diameter with a 0.6 mm thickness. It is manufactured from V2A stainless steel in accordance with DIN 1298 for fixed liquid and gaseous fuel installations. The component achieves a fire resistance rating of DIN V18160-1 T400 N1 D 3G (400) and provides certified protection against soot fires.