Magnets are from original OEM flywheels. Two magnets, one of each polarity. Must be epoxied in flywheel. Must alternate polarities when installing in flywheel. Helpful hints and a link to a good instructional video included. These are 3/4 inches wide. Painted to indicate polarity. Cleaned and old glue removed. Orders in by noon eastern time usually ship same day. Shipping cost is combined when multiple sets are ordered.