Dealer package assortment with 10 rolls each of red, brown, blue and yellow wire. Length of each roll 10 meters / 390 inches. Wire cross section 0.75 sq. mm / 0.0012 sq. in.The wire in this dealer assortment with its cross section of 0.75 sq. mm / 0.0012 sq. in. is recommended for all Märklin layouts.