Metal Caster Wheel for Robot-20mm

Metal ball caster, 1mm thick steel plate from the machine stamping, it has the capability to support 50 KG payload.  The Caster is strong and lightweight with a total weight of only 120g.
Large steel ball around a small ball around as much as 40 to rotate the main scroll ball much more smoothly, which make the robot walk or move at a more flexible and comfortable way.
Dimensions: 55 X 30 mm
Weight: 120 g
Load Capacity: 50 kg