These strontium ferrite ring magnets measure 2-3/4" Dia. x 1/2" thick with 1-1/8" Dia. center hole. An excellent value because of their high coercive strength and high corrosive resistance, these magnets have a strength of 110 gauss at 1.5” and a lift of approximately 7 lbs. Each magnet has a protective epoxy/vinyl coating and can be used for a variety of hobby and industrial applications. Slight imperfections in each magnet are possible: manufacturer’s seconds. Each ring is magnetized on its largest dimension.