TEAC TASCAM M-3500 M-3700 Mixer slider fader knobs (small) used on input modules

These are the much smaller fader knobs used on the M3500 mixer approx 20mm long at the base,

I have them now grey with black line , grey with red line and a few which have become smokey, i list these as if you put the others on they look a bit odd

These are rare, in fact I have never seen them for sale apart from here