1-1/2" Stud Type Ball Transfer CSBT-1-1/2" CS/SS 3/8" Threaded StemCSBT 1 1 2 CS SS Stud Type Ball Transfer Ball Bearings 1 1 2" Inner Diameter CSBT 1 1 2 CS SS Stud Mounted Ball Transfer Unit, Main Ball is 1 1 2" Inch, 1 1 2" Main ball rotates on (90) 3 16" support balls, CSBT 1 1 2 CS SS stud mounted ball transfer is a heavy duty ball transfer unit, capable of supporting as many as 250 pounds (per unit). CSBT 1 1 2 CS SS features a 1 and 1 2 inch ball bearing resting on 90 individual support bearings and is ideal