Teac A-3440 and many others tape head block plate

Maybe a a common block on 4 head machines but listed like this

You can identify them by the holes as this has a triangle one on the left I think its on the A-2300SX A-3300SX as well not sure about that

These are useful it you want to use a different head stack or they simply have corroded

I have all the other parts springs etc listed on their own