This is the replacement bearing intended to be used on Tornado: Tournament Play 2000 and Cyclone II. Tournament 3000, Coin-Op
Each rod has a bearing 'set' at each end. Each bearing 'set' has 2-bearing halves on the inside and a bearing nut on the outside. Usually you would want to replace 1 of the halves to give you a nice smooth surface for the rod to slide on. Remember, bearing nut's rarely ever go bad. People accidentally order new bearing nuts thinking they need them when they don't.
Hint: Put the smoothest half down.