I'm selling this because it didn't fit when I installed it in my salon. I've only used it to test it out, so I think it's in very good condition. Auratec is a Japanese company based in Chikugo City, Fukuoka Prefecture, that develops and manufactures products applying microbubble and nanobubble technology. They began selling the first "Purebble" in 2008 and currently sell "Purebble 11." Auratec's representative, Eguchi, developed microbubble technology from childhood memories of beautiful water, and is constantly working to clean water without using chemicals. They have obtained several international patents and are a pioneer in the microbubble industry.