Inner curve: R3 = 515 mm / 20-1/4" / 30°. Outer curve: 30° with a parallel curve spacing of 64 mm / 2-1/16". Hand lever included. Two (2) each 24315 track are required on the inner and outer curve of the turnout. A roadbed piece to fit here is included. The 74491 electric turnout mechanism, the 74461 digital decoder, and the 74470 turnout lanterns can be installed on this turnout.