They use a pretty standard ego 510 connection. The top photo is of the Tangerine Dream apple style. It is rockin a DCA306 from goodsense vapors and the MA306 lr atty with the earth Peterson stem. I also like the super huge smoktech dual coil cartos. I own a few of the empire mods drip shields and they work perfectly also. Ive also used my tube tank on the pipes and it works great. The standard sized pipe uses a IMR 18350 flat nose 3.7v. He also makes a high voltage mod using the larger batteries although I dont own one. Well I dont want to sound like an add for epipemods but indeed I do like them along with his incredible customer service. He will make any custom pipe you want also btw in case you have some crazy idea, he seems to like those although the wait time for custom can be long, but being a headfi person Im sure you can deal with that lol.
Check this link, it is to his photobucket album of basically every pipe he has made.
I think I may pick up a provari for my birthday though, kinda want to try a VV mod.