For open tank mounting Straight through design Motor: Flanged mounted 2-speed motor 3 phase 18.5/21.3 HP 50/60 cycle 380/415/440/660 volt 1470/1765 rpm 316 stainless steel shaft 65mm diameter x 1100mm long with 300mm diameter sawtooth impellor No seal on shaft Cast iron stool Size 8 with sealed mixer shaft bearing Stool base plate 460mm square