Steel alloy track with black roadbed; 2/card These bumpers properly finish the ends of your track spurs. WARNING: CHOKING HAZARD – SMALL PARTS! NOT INTENDED FOR CHILDREN UNDER 3. Bachmann’s exclusive E-Z Track system makes set-up quick, easy and fun. Steel Alloy rail. Black roadbed. E-Z Track System – Snaps Together, Stays Together on Floors, Tables and Carpets.