Electrical insulating matting certified according to IEC 61111:2009 in class 4, with an operating voltage of 36,000 V, a test voltage of 40,000 V and a withstanding voltage of 50,000 V, with permanently vulcanized marking tape. Vulcanized elastomer fine grooved is available in gray color, 4.5 mm thick (+1/-0.2mm) with basic weight 6.1 kg/m2.