RIGHT Features R3 Inner Curve: Radius = 920mm / 36.2" and a radius of 52.5° (60° with G3 7.5°) R5 Outer Curve: Radius = 1240mm / 48.8" and a radius of 37.5° (45° with G5 7.5°) Each curved switch includes a G3 7.5° curve and a G5 7.5° curve Built-In light spring mechanism holds rails where they are set, but allows trains to pass through against the points rails without derailing. No separate machine or manual switch throw needed. Hidden jumper wires to ensure reliable long term electrical contact. Easily convert any PIKO switch to remote operation by adding a PIKO 35271 switch machine and a switch controller 100% Virgin Brass Rail Code 332 (0.332" high) solid rail. Ties are made of ultraviolet-stabilized HDPE Unique track geometry makes even complex track plans simple to build with only a few different track sections. Compatible with most other brands of G-Scale track for unlimited expansion possibilities. Sturdy push-together rail joiners are factory-formed to fit tightly to the rail profile. Compact design, coordinated with the PIKO G-Track geometric system. Made in Germany. For best results outdoors, use PIKO RailClamps. WARNING: CHOKING HAZARD - SMALL PARTS! NOT INTENDED FOR CHILDREN UNDER 3.