Siemans 400 amp, 240 volts, 3 phase safety switch: I-T-E General Duty, Enclosed Safety Switch.  Catalog number: JU325, series B, 3 pole non fused switch, indoor type 1 enclosure.  32-1/2" high x 22-1/2" wide x 12-1/2" deep.  125 maximum horsepower rating, it weighs about 95 pounds.  Purchased new, never installed, $300., no haggle price.  I have the original shipping box, local pickup only.  In Escondido, call (760)746-7209