Details: NICKEL SILVER MARK 4 - BLACK TIES As a Customline(c)Mark IV turnout, each can be set up as a remote or manual switchdepending on which switch machine is added by the modeler. Each turnout will have die-cast points and an isolated, die-cast frog with a power contact to optionally energize the frog and prevent loss of power when a locomotive is passing through. Specs: The outside radius of the turnout is listed at 30"; the inside radius is 22". WARNING: CHOKING HAZARD - SMALL PARTS! NOT INTENDED FOR CHILDREN UNDER 3.