Used Oliver Tractor Duals/Spacers - Dual Hubs The source equipment for this component: Oliver 66 Tractor Available at Downing Tractor Parts in Downing, WI. This component has been removed from the equipment and has been cleaned and inspected. It is available for immediate shipment. Item ships via freight carrier, for a freight quote or additional information call to speak to a sales rep about this unit. Please reference number CP-7434. Applicable sales tax will be charged.