I just looked it up. Bridgeless, 901 with 510 connector; no air holes in the connector. One air hole on the side. One comment was tight draw... i used to use only 901's and mostly get 901 HH357's. Mostly because flavor of 901 and slightly cooler vape.
Hanna is awesome, he has answered all sorts of questions I had, rebuilt a .357 for me, just overall has taken care of me. He(and avidvaper) will continue to get my business. Actually, just reminded myself to get over there and place an order. I need some more .357s, only one brand new HH left in my backup stash. I've also been meaning to try the 510H, which is a 901 atty with a 510 native connection. No more funky extenders and stuff to use a drip shield!