Pack Science Beveled Edge Round Bottom Enail
I really have only tried it a couple of times but neither was anywhere near as satisfying as I hoped for. Each time the product pooled in the middle of the nail and then would not get hot enough to vaporize, I was able to force vaporization but it required a much more emphatic rolling / rocking than I found enjoyable. Maybe it i just the product I'm vaping but that is another discussion. The nail is probably fine but its not for everyone obviously and I'm one of the ones in the not group.