6" Heavy Duty Caster Wheel 551 Lbs - Aluminum core - Rubber - Top Plate Mount Inner Diameter - 80mm the 6003 2RSJ EM inner

the 6003 2RSJ EM inner diameter is 17mm

Equal MRC 1816S

SMK16UU Bearing

CSCG060 Thin Section Ball Bearing

6" Heavy Duty Caster Wheel 551 Lbs - Aluminum core - Rubber - Top Plate Mount Inner Diameter - 80mm the 6003 2RSJ EM inner6" Inch Caster Wheel 551 pounds Swivel Aluminum core and Rubber Top Plate VXB005150BABL Heavy Duty Wheel Diameter= 150mm Wheel Width= 50mm Wheel Diameter= 6" Inch = 150mm Overall Height= 190mm Overall Height Inch= 7. 480" Mounting Type= Top Plate Top Plate Size= 115mm x 100mm x 6mm Hole distance= 72mm x 85mm Wheel Core= Aluminum core and Rubber Tire= Aluminum core and Rubber Bearing type= Double ball beaing Load Capacity= 551 lb Mounting= Swivel