This listing is for TWELVE (12) Cox Slot Car Pro Controller Factory Service Build Parts SOLID ALUMINUM HEAT SINK. Very rare to see unused. Pulled from an old factory case. Use one alone or gang several for more heat dissipation. Guaranteed original as factory build sheet is pictured, but not included. PINK FACTORY PART BUILD SHEET IS PICTURED FOR REFERENCE AND IS NOT INCLUDED. Sold as is. Buy with confidence please check out my other offbeat slot car related items. Descriptions are very accurate; No Returns. PLEASE ASK BEFORE YOU BUY IF YOU ARE UNSURE. We ship promptly professionally. We happily combine orders refund any excess s/h immediately upon shipping. We can always provide tracking. ************** From I Only ship U. S. Postal Service PRIORITY MAIL TO THE USA due to previous 'lost' packages. ******************* I charge $2 for expert handling/packaging, actual shipping. I ship out of the country almost daily. Please refer to my feedback, rating or time selling HO slots for assurances of a good honest deal. happy motorin' thanks S'lots from Bob. We Know H.O.