ML203UADNSNNNWC, Cutler Hammer, Magnum DS, circuit breaker part, carriages/ cells / cassettes, universal cassettes for drawout circuit breakers, cassette standard features include an arc hood, provisions for secondary terminal blocks including wiring, and a cell rejection kit, shutters installed, door escutcheon & gasket kit included, pre-wired, suitable for standard Magnum DS 3-pole 800-2000A MDS frame low voltage air circuit breakers