Neodymium Cup Magnet With Female Threaded Post | Magnetization Direction: North Facing Out | Overall Dimensions: 3/4" Dia X 1/4" Thick Steel Cup Encased Magnet, 5/16" Dia X .237" High Post With #8-32 Hole, .512" Total Height | Grade: N40 | Plating: Ni-Cu-Ni