These are 2.8mm and properly fit all Lionel "O" and "O-27" engines including 224, 225, 226, 675, 2026, 736, 726, 763, 700E, and more!

12 piece set, 4 light green, 4 original Lionel emerald green color, and 4 red.

Select a quantity of 1 and you will get 12 pieces.

Select a quantity of 2 and you will get 24 pieces etc.

Thanks for looking!  

See my other listings for various combinations of colors.