This Faller N Scale Double-Track Curved Stone Viaduct kit includes five piers offering vertical clearance of 4-3/4" 12cm and two abutments. The track base comes in three 22.5 degree sections for a total of 67.5 degrees of curvature. Total bridge height is 5-3/8" 13.6cm. The inner curve radius is 6-3/4" 17.2cm and the outer curve radius is 9-5/8" 24.5cm - suitable for smaller North American locomotives and rolling stock. This easy-to-build plastic Double-Track Curved Stone Viaduct kit features parts molded in appropriate colors and will make an excellent addition to your layout.