Description of Ball Caster N20 Mini Ball Caster Robot Ball Wheel consists of four small balls and a diameter of 12mm large steel ball. All steel balls are with 304 stainless steel ball, to ensure long-term use will not rust, the outer ring material is plastic, suitable for smart car chassis Support and desktop miniature robots above. Miniature ball caster is light weight, easy to move around. Solid and durable, mini ball caster wheel is made of premium material for quiet and smooth rolling. The caster wheel makes the robot to walk or move at a more flexible and comfortable way. Ball Caster 3PI N20 This ball caster can be used as a general-purpose ball caster. QUICK SPECS: Height: 1.5cm Distance between two screw holes: 1.5m Length: 2.2cm Ball Diameter: φ12m
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