E3 diamondfire model number?

E3 Diamondfire Follow Up

Ok. Other then taking my plug to the store and matching them up, how do I tell which one I need?
Just ask for the diamondfire E3 plug. I got mine at Lowes. It will be shorter than the stock plug. Remove one of the two washers and you'll be okay.
This is the plug I have on my HT.

E3 is the model number per say.
I have used an E3.12 plug in my bike successfully. That's all of the identification that the plug has.