N42 Neodymium Arc Magnet for Engineering, Manufacturing, DIY and Motors 37.5mm O.R. x 33.5mm I.R. 90 degrees 25mm thick (North)

25mm high x 4mm thick, with an outside radius of 37.5mm and an inner radius of 33.5mm The magnet's north pole is on the inside radius and the south pole is on the outside radius Four of these north arc magnets with four of the south version are required to create a 360o 8-pole ring Coated with three layers of nickel, copper and nickel to reduce corrosion and provide a smooth and clean finish