{"title":"Replacement 3pi Ball Caster with 1/2 Plastic Ball","handle":"replacement-3pi-ball-caster-with-1-2-plastic-ball","url":"/products/replacement-3pi-ball-caster-with-1-2-plastic-ball","description":"This ball caster was originally released as a replacement part for the 3pi robot, but the 1/2″ ball can also be used a replacement part for the newer 3pi+ robot, which has the housing for the ball built directly into the chassis.  This ball caster can also be used as a general-purpose ball caster: when mounted through a hole in a chassis that uses our micro metal gearmotors and our 32×7mm wheels, as on the 3pi, this ball caster is just the right height to keep the chassis level.","vendor":"Pololu","product_type":"physical","in_stock":true,"options":[],"variants":[{"id":12343,"title":"Default Title","sku":"PL-957","price":2.0,"compare_at_price":3.29,"on_sale":true,"in_stock":true,"available_quantity":5,"option1":"Default Title"}]}