Device duct cover, smooth, visible surfaces electrostatically powder-coated in RAL color according to manufacturer's catalog, cover and duct base must be electrically connected, including a potential equalization terminal GPK 63.certified! Use for: Device duct bases GKU ... VW DKU ... VW PGU 120-78 VW PLU 120-78 VW for cover opening: 78 mm Surface structure: Visible surface smooth Delivery length L: 50 mm Color: traffic white RAL: 9016 (similar) Material: Steel, strip galvanized in accordance with DIN EN 10346