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 62315 track are required on the inner and outer curve of the turnout. A roadbed piece to fit here is included. The frog is metal and can be polarized. The 74491 electric turnout mechanism, the 74461 digital decoder, and the 74470 turnout lanterns can be installed on this turnout.