This is the 39000. I got it used off craigslist for 1k. previous owner bought it new about 4 years before I got it. I had a father and son team install it for me 400 bucks. I wanted to make sure it was done right. He has been doing it for over 25 years and he said this lift was built way stronger than alot of the new ones today. One of the biggest base and gauge metal that he had seen. It only took them about 2 hours, I love this thing and feel very safe under it even with a big truck!