Here's your choice of round shifter/lever knobs in five different colors.
Use them on Futurattraction's levers as well as their Hurst, Lenco and Liberty shifter sets.
Go with a period correct white or black, or match your interior color, or just be different.
One pack contains 6 round knobs, one of each color: Black, Red, Blue, Green, Yellow and White..
Ball diameter is 3/32", 2.4mm.
These knobs are really small push pins with the metal pin removed, which leaves a small hole already centered in the knob.
Five round knobs by Ted's Modeling, 1/25 scale.