These are hair rollers sort of like the the old-fashion, flexible snake rollers I used as a kid. But these come with 20 rollers that change color when ready to use. Let me tell you that if you want super tight spiral curls, then this is the product for you! When I used them the first time, I used up all the rollers for my hair and that was a big mistake...I ended up with Shirley Temple curls! Not my kind of style. I then used them a second time, but with only a few rollers and big sections of hair and the results were amazing. A beautiful head of cascading curls, I definately recommend this product :)