Device duct cover, visible surfaces electrostatically powder-coated in RAL color according to manufacturer's catalog, cover and duct base must be electrically connected, including two equipotential bonding terminals GPK 63 each 2 m delivery length.certified! for device duct bases: DKU 170-78T ... C for cover opening: 38 mm Surface structure: visible surface smooth Delivery length: 2000 mm Color: pure white RAL: 9010 (similar) Material: steel, strip galvanized in accordance with DIN EN 10346