« Previous page Four Wheel Dolly System : VPD-4 : VPD-55 : VPD-55 Rotating Seat-Unit VPD-55 is the Rotating Seat-Unit for use with the VPD-4 System. Minimum height 430 mm above Platform Maximum height 615 mm above Platform Seat Diameter: 360 mm Weight of unit: 10 Kgs