4 neodymium traction magnets for HO slot cars. These are great with the stock height tires because they don't over heat the motor from too much down force. You can use 1 to 4 magnets to get the best handing for your cars. One drop of CA glue for each is all you will need.
Body and chassis not included.
Don't forget to check out my other auctions to get 8 for $7.99