BT-1 1/2 CS/SS Flange Ball Transfer 1-1/2 Main Ball Mounted BearingBT 1 1 2 CS SS Flange Mounted Ball Transfer Unit 1 1 2" Main Ball Proudly made in the USA BT 1 1 2 CS SS Flange Mounted Ball Transfer Unit, Main Ball is 1 1 2" Inch, 1 1 2" Main ball rotates on (90) 3 16" support balls, BT 1 1 2 CS SS is flange mounted ball transfer is a heavy duty ball transfer unit, capable of supporting as many as 250 pounds (per unit). BT 1 1 2 CS SS Bearing Ball Transfer unit Ball Material: Stainless Housing Material: Carbon