The glow plugs that I used to order years ago were "standard long" with an idle bar.
I don't remember there being all the different variations (numbers, etc.) back in the day. I thought my stuff was pretty much standard stuff.
I have a couple of engines, a Tower Hobbies .46 and an O.S. 60 (I think). I run 10% nitro in both, and always used the same glow plugs for both.
Any advice / help is greatly appreciated. Thank You