NBT-1 1/2 SS Ball Transfer Unit 1-1/2" Main Ball USA BearingNBT 1 1 2" SS Flange Mounted Ball Transfer Unit 1 1 2" Main Ball Proudly made in the USA NBT 1 1 2" SS Flange Mounted Ball Transfer Unit, Main Ball is 1" Inch, 1 1 2" Main ball rotates on (90) 3 16" support balls, NBT 1 1 2" SS is a heavy duty ball transfer unit, capable of supporting as many as 125 pounds (per unit). NBT 1 1 2" SS Bearing Ball Transfer unit Ball Material: Nylon Housing Material: Stainless Load Capacity: 125 lbs Quantity: 1 Bearing