Used twice comes in box with instructions. 25 quid inc p&p. Paypal preferred
Powerful neodymium magnets work with the sintered 12.5mm rotor to give racers powerful acceleration and plenty of torque to suit a wide range of driving styles and car types, and optional rotors are available to fine-tune the power band of the motor for your specific needs.
http://www.hpieurope.com/piw.php?lang=en&partNo=101728