This is for extending the Märklin roller test stands by 40 cm / 15-3/14". It can also be used by itself as a presentation base. It is ideal for models such as the class 03, class 41, and the Mikado. The superstructure is made of anodized aluminum shapes. C Track sections with removable end pieces, including an adapter piece of track for extending a roller test stand, come with this extension. Dimensions 400 x 42 x 30 mm / 15-3/14" x 1-5/8" x 1-3/16".