110 v 1500 watt, 8". Was told 1100 watt one wouldn't work, had to have this one at highest level to get lead to 650, which means adding new lead can't be added too fast. Everything I read says don't bother trying to make shot till summer, I wanted to test, but by the time I had all my coolant added, in and out of room, temp in room had dropped to 60, so that didn't help. I bought double drippers, I know this is going to be a problem keeping up with melting the lead, that was why I mounted lee 20 lb pot above to feed it. And of course, I couldn't get lee pot to pour, screwed in, screwed out, nothing, so I guess I'm working on that before I do anymore casting.