i started off with a mirage and then bought an evo from intellicig both are interchangeable, i was under the impression these are a 901 but ive just bought a 901 pass through from oksmokey and the thread is a wider diameter than the atomisers from the mirage and evo. Luckiy i also bought anatomiser with the pass through so i can use it ok. Im waiting for a tecc titan 510 to be delivered, this is dfferent again right?