Blu? haha - except Blu only has a little 90mah batter so it is not Blu
You mean the guy on the right - correct?
My guess is Joye 510 mega xl in black with a black cartomizer (or the black atomizer and cartridge but cartomizers are better for thinner juices and just for consistent vaping) - that's about 128mm, and you can extend that with a black delrin drip tip (just like mine at home but I use a bright magenta drip tip). Or he could he using atomizer + drip tip.
Buy manual. Much easier to get a good hit and the threaded end is totally sealed so you could also use a drip tip (that guy could be using a drip tip on an atomizer - he is getting a lot of vapor which implies a high VG juice and they work best on atomizers)
And it's hard to tell but he may have decorated the battery a bit.
510 is the most popular threading. The mega xl manual batteries are very nice. 280mah charge.
This - but also buy 3 ohm Boge cartomizers and learn to use them (slim ecigs cannot use the hotter LR 2 ohm ones), and buy a black delrin drip tip or other drip tip. If that shop doesn't have those items then LiteCigUSA.net does.
Joye 510 Mega Black Starter Kit | Route 66 Vapor