W/ main panel 1, rear panel 1, bottom panel 1, rear cover gasket 1; coated w/ chemical film, painted one coat black wrinkle all outside surface prior to installing 2 studs, 2 grommets, and rear cover gasket; 12.462 in. Lg; 3.500 in. Nom h; 37 mounting holes, 0.180 in. Dia