Professor Motor PMTR1056 Neodymium Bar Magnet 19 x 6.1 x 1.5mm.
Professor Motor Neodymium Bar Type Traction Magnet - Direct replacement for TSRF TSC10 - 20+% stronger - can be adapted to most brands of 1/32 cars - thin enough to mount under chassis on many cars - 19 x 6.1 x 1.5 mm (0.75 x 0.24 x 0.06 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.