https://www.fasttech.com/products/1746002 (Stainless Steel Silver(B))

The difference between 'A' and 'B', two different manufacturers, (easiest way to tell is the presence of the USA logo on switch or not. The B one is the one without the USA Logo.

I'm lazy so no pics, but here's a short review.

Pros
1) Arrived in mint condition, no scratches whatsoever
2) Threads are smooth
3) Has pretty good weight to it
4) Spring supports the weight of the mod + Atty
5) Short throw switch, fires at any angle your finger may land (whereas the other variant appears to require the switch to be pressed right in the middle)
6) When broken in, switch is very smooth

Cons
1) Two pin adjustment for the center pin unscrews itself whenever the switch is removed for battery replacement. (requires to be perfect to prevent battery rattle), and a few times, has loosed the atty off of the mod.
2) Locking ring takes sometime to get used to, but isn't anything major.
3) Machine oil residue (very common, just put a torch to it)


A note about packaging, it was shipped wrapped in thin plastic, absolutely no protection from anything else you may have ordered with it. (could become problematic and cause scratches)

Overall, I'm very happy with it and it has easily replaced my single tube nemesis clone. The overall weight and the short throw on the firing switch is just gold!
@ $24, I'd gladly pay this price for just one of these 18650 tubes.