How to identify E-shafts?
 

Hey everyone,

I have a few e-shafts laying around that I would like to identify. It has been too long for me to remember well enough what is what. So my question is how do you identify the different e-shafts? I need to tell between a S4 T2,S4 n/a, and a FD. Or are they all the same. I'm thinking that weights may be the answer. Thanks for any help
Dave