Keep your drive wheels clean with this handy set of rollers and drive wheel cleaners from Bachmann. Include six rollers and four cleaners. Works with both DC and DCC engines. For locomotives up to 19.7′ 50cm.WARNING: This product can expose you to chemicals including LEAD, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov