It's the 40 size with a Super Tigre G51 in it. So far it's been a blast to fly, very stable but yet can do just about anything in the right hands. If I had to do it over again I probably would have spent the extra cash and purchased the 60 size kit. I tend to fly my stuff further away than other pilots at my field so things can get small quickly. No complaints though with either how it built or how it flies.

Good luck with yours,
Dan