NFSBT-1 1/2 CS Ball Transfer Unit 1-1/2 Main Ball USA made BearingNFSBT 1 1 2 CS Ball Transfer Unit 1 1 2" Main Ball Proudly made in the USA NFSBT 1 1 2 CS Ball Transfer Unit, the main ball is 1 1 2" Inch, NFSBT 1 1 2 CSCan be recessed into the surface of the application forming a smooth and multi directional rolling surface, Unit available with carbon steel balls or stainless steel balls to provide corrosion resistance. NFSBT 1 1 2 CS Ball Bearing Ball Transfer unit Ball Material: Nylon Housing Material: Carbon