http://www.aaronequipment.com/usedequipment/centrifuges/decanter/flottweg-z4d-4-454-46041001 Used- Flottweg Z4D-4/454 Solid Bowl Decanter Centrifuge. 316 Stainless steel construction (product contact areas), maximum bowl speed 3500 rpm, approximate 5" single lead conveyor with welded hardfacing, Rotodiff backdrive with powerpack, feed pipe, lubrication system, adjustable liquid plate dams, 30 KW, 400/3/50/2956 rpm ABB main drive motor with fluid coupling, frame/casing, vibration isolators, safety guards.