I emailed SS BrewTech support and the response is that only the sleeve is jacketed.
Swing and a miss!
Completely agree that even if only the sleeve is jacketed, it is FAR better than a cooling coil. If I was starting from scratch I wouldn't hesitate. Right now I have a Spike 7 gal, 14 gal...
If these were fully jacketed, cone included, it would be a slam dunk for me and I'd be selling equipment to make room for them. Sure looks from the pics that only the sleeve is jacketed -- and only about 60% of the sleeve at that. If that's the case, I'll keep looking (and waiting and...