These were removed from a Tascam 144 but I have seen photos of the 244 and they seem the same.
Two types Stereo and Mono
They are in an as is state, they should be cleaned only with De-oxit F5 fader lube spray, please dont even think of using others as the Deoxit leaves a oily residue that helps the slider roll along smoothly.
As a rule for Pots volume controls I use one deoxit to clean and then the fader lube to loosen and oil but for faders you should use just the F5.
I guarantee these will work, though i dont like cleaning them and then they sit in my stock, better clean and use
Single slider 10k Log body length 90 mm
Dual slider body length 90mm x 20mm