Jayhawk Mustard Mill. Model: 2MPYC. Century Motor, 7.5 hp, 3470/2890 rpm, 220-440 V, 60/50 cycle, 3 phase. The ultimate in wet process stone grinding. These mills use designed, precision balanced, diamond cut stones. Inlet: 1 in. flared threaded end. Outlets: (1) 4 in. L x 1 in. W discharge. Overall dimensions: 27 in. L. x 15 in. W. x 16 in. H.