Tascam roller cap. mystery

I wish someone could tell me where these are from, I have some rollers that were from the X series but they are different , these roller have an over hang, so it could be a 32 34. but I have others that have an overhang as well and a raised part inside these do not.

I decided to list these and hopefully I can get some feed back, maybe its an X series smaller machine

Dimension are about 27mm wide and they have a deeper groove than others