This Atlas HO Scale Code 83 Snap-Switch Turnout features Code 83 nickel-silver rail with brown molded-plastic ties and a plastic frog. The turnout comes equipped with an attached remote controlled, above-benchwork electric switch machine. The switch machine can be thrown with a Switch Control Box, 150-56 (sold separately). The 18" radius turnout also includes a 1/3 18" radius curve compensator track so for planning it equals one 18" curved section. The Snap-Switch turnout can also be thrown manually using the small sliding lever on the turnout. For track planning purposes, track geometry matches the Code 100 Snap-Track line in terms of standard curve radii and section lengths.