7.750 in. Lg, 5.250 in. W, 4.188 in. H, external adjustment, two switches, adjustable range 0.0 degrees f to 225.0 degrees f, operating temperature 250.0 degrees f, immersion stem 0.500 in. Npt brass fitting, 2.250 in. Lg belowthreads, separable well, 125.0 to 250.0 vac, 15.0 amps