It's a Roland TD-7, roughly like these, slightly better than this, specifically with 8 dual-trigger pads, I think 4 (5?) are 9" and the other 4 (3?) are 7" (that is, PD-9 and PD-7s respectively). If you listened to any of this 24-hour album (or the sequel), you've heard it in action.
I'm selling because despite being electronic they're still a little too loud for my thin-walled apartment, so I haven't used them in over a year, and I'm hoping to upgrade to a (silent) next-gen kit.