4WD smart robot chassis kit for sale. Used only once, still like new. Inbox for price. Package includes: 2 x acrylic transparent base plates (top and bottom floors), 4 x high-quality 65mm plastic wheels integrated with rubber grip tires, 4 x dual-shaft 200 rpm BO gear traction motors, 4 x slotted mechanical speed encoder coded disks, 8 x heavy-duty acrylic structural motor fasteners / T-brackets, 8 x insulated pre-stripped connecting interface cables (red & black, 20cm length), 6 x M3 hexagonal brass standoff columns, 6 x M3 machine bolts (cross-head, 8mm length), 8 x M3 machine bolts (cross-head, 30mm length), 16 x M3 hexagonal fastener nuts.