Slim Log e-pipe was crafted to fit 18 mm tanks. I was searching for a “lighter” look of an pipe mod and this slim Merlin Nano RTA with poker styled bowl accomplished that task quite good. Although I wanted to look the pipe as black as possible, I didn’t want to use rustic surface on this piece of Algerian briar. It would be a shame to hide that grain. The Slim Log e-pipe is powered by one 18350 Li-ion cell.