Plastic Track + Driving Wheel + Bearing Wheel Set Accessory For Smart Robot Car DIY Part

There are two kinds you can choose: A: 1 Pcs Plastic Track + 1 Silver Driving Wheel + 2Pcs Silver Bearing Wheels B: 1 Pcs Plastic Track + 1 Gold Driving Wheel + 2Pcs Gold Bearing Wheels C: 1 Pcs Plastic Track + 1 Silver Driving Wheel + 3Pcs Silver Bearing Wheels E: 1 Pcs Plastic Track + 1 Silver Driving Wheel + 4Pcs Silver Bearing Wheels G: 1 Pcs Plastic Track + 1 Silver Driving Wheel + 5Pcs Silver Bearing Wheels Bearing Wheel parameters: - Title: Metal bearing wheels - Color: silver or gold - Material: Aluminum - Type: with connectors - Size: 31.85 * 48.3 (diameter) * 34.08 (connector) mm Driving Wheel Parameter: - Name: Metal wheels - Color: silver or gold - Material: Aluminum - Type: with connectors Track parameters: - Name: Track - Material: Plastic - Color: Black - Size: 4.5cm * * 78cm / stripe (about 100joint) Package included: 1 x Track 1 x Driving Wheel Several Bearing wheels Several Screws & Tools