New NuStep UE8 Upper Body ErgometerNuStep UE8 Upper Body Ergometer The Pro has an 18 inch wide seat. The Max has a 22 inch wide seat. That is the only difference between the two models. Ergometer Features Sit, stand or direct wheelchair access without removal or attachment of the seat Low starting force with 15 levels of resistance Bidirectional operation Integrated sensor technology Compatible with WellGrip accessory Ergonomically designed seat with contoured back swivel 360 degrees