Professor Motor PMTR1057 Neodymium Magnet 8mm Round x 2.7mm Thick.
Professor Motor Neodymium Round Traction Magnet - Direct replacement for Scalextric / Ninco / NSR or other similar Round Magnets - 10+% stronger for equivalent size - can be adapted to many brands of 1/32 cars - 8mm diameter x 2.7mm thick (0.31 x 0.11 inches) - 24 Karat Gold plated finish.
SAFETY WARNING! - These small magnets are very powerful and can cause serious injury or death if swallowed - keep away from small children and pets.