Snap-Fit E-Z Trucks 18" Radius Curved Tracks (4/Cards) - Steel Alloy Rails Black Road Bed - HO Scale Bachmanns exclusive E-Z Track System makes setup quick and easy E-Z Track snaps together to floor, table or carpet This product features steel alloy rails and black road bed. 18" radius curve track is the basic curve of the E-Z track system. It can also be placed inside of a 22" radius curved E-Z track, to achieve double track mainline realism. Four tracks consist of 1/3 (120 degrees) round 36" diameter.