What size parting tool for QCTP?

[DanH]

Wow, thanks for all of the responses, I have been hard at work and couldn't get back until now.
Yes, I have a BXA tool holder which has the 11/16" opening for the parting tool blade to mount in.
I'll go out and take a picture of what I have to better explain my question. Looking at the ENCO web site there are blades that would fit but they come in different heights and different thicknesses which is were my confusion is. I will now go back and study the comments and links, thanks again for the help.
Dan