Bowser easy-to-build kits feature plastic molded bodies, underframes, brake platforms, brake wheels, coal loads (where appropriate), free-rolling trucks, nonmagnetic wheels, x2f couplers. Other features include authentic painting and printing, and coupler pockets that accept Kadee #5 couplers.WARNING: This product can expose you to chemicals including STYRENE, which is known to the State of California to cause cancer. For more information go to www.P65Warnings.ca.gov