Unkefer Equipment LLC 1115 North Market Street , Minerva , Ohio 44657 USA About Solutions products Companies Unkefer Equipment LLC Products Model 6 Series 90-120 PTO HP6 - Tractors Model 6 Series 90-120 PTO HP6 - Tractors From New Engine Driven Products 0 Share Mid-range. 3 Models. Available in standard and premium. Perfect combination of transmission, hydraulics, and cab options. Customer reviews No reviews were found for Model 6 Series 90-120 PTO HP6 - Tractors. Be the first to review! Add your review Publish your review Great! review successfully added!