I used this once on my hair, which is a semi-long length. Since the straightening lasts for several months after one use, it's not something you use repeatedly, so I'm selling it. In my case, the effect lasted for more than six months. It's convenient and affordable because you can straighten your hair at home with this, without having to go to an expensive salon♪ Remaining amount: You don't use much for one application, so I think there's almost all of it left. ① Crystallizing Straight α Agent 1, 400g ② Crystallizing Straight α Emulsion Agent 2, 400ml Set of 2 For professional use. Please purchase only if you know how to use it. Please be responsible for any problems caused by the chemicals. There are no small children, animals, or smokers, so there are no such smells or stains, but it is stored at home, so please bid only if you understand.