This describes the intended use directly from the manufacturer's documentation

Som adapter i el-tekniske og laboratorieprægede målesituationer

Upper material: nubuck (stated)

Jording: Udstyret med jordledning til EX-områder

Størrelse: 8 mm

Ringbind ESD 4 D-ringe 38mm ringhøjde Unit(s):Pcs This describes the intended useProduct Description This dissipative A4 ring binder from DESCO, identified as DESCO part 238721, is constructed with four rings and a ring height of 38 mm. The surface is covered with anti static (dissipative) PVC in light blue. The product is specified for A4 portrait format. Electrical properties The surface resistance is specified as RS = 1 x 10^5 to < 1 x 10^11 ohms according to IEC 61340 2 3, as stated in the manufacturer's product information