Lightnin Mixer. Model: D4. S/N: 484559. Lightnin Motor, 1-1/2 hp, 1725 rpm, 220/440 V, 4.4/2.2 amps, 60 Hz, 3 phase. Lightweight for easy handling. Unit has a shaft with course threads sized at 1-15/64 in. W. x 3 in. L. threaded all the way up the shank for adaptability for different functions. Overall dimensions: 27 in. L x 14 in. W x 10 in. H.