I do not have the specs. I will try to get some pics soon, but I have trouble downloading on this site? This is what I can tell you . I have a 3.5 - 4 inch pin, drilled pin up with a balance hole about 1" to the right of the center line. Was drilled aggressive. Again since I polished mine and change the surface to 2K, its just been the best rolling, most consistent ball I have. Rolls smooth and hits! Yes I leave my share of 10's as well. Most of the time I can move a few boards (or hand position) to correct this. If it don't, then I change balls. Bill, I also want to try the Eternal Cell, but I have to get the Snap Lock. Decisions, decisions?