2 ports, for extending UP0 junction boxes to UPk junction boxes, suitable for all modular junction boxes, matt surface, with viewing window for enclosed label insert, label sheet 209 x 294 mm see accessories, integrated dust protection flaps (also available in color) see accessories, colors traffic white (RAL 9016), pure white (RAL 9010) or pearl white (RAL 1013), variants: traffic white, pure white, pearl white