With the BaByliss 3021E you get 20 rollers of 3 different sizes. Handy, because that's how you create a natural-looking curling bunch. The rollers require a maximum of 5 minutes to warm up. One of the rollers has an indication point that lights up white when the rollers are ready for use. The rollers stay warm for about 15 minutes, making them suitable for curls in different hair types. Curls your hair hard? Then you leave the rollers in your hair for at least 10 minutes. After use, store the curl set in the supplied storage bag.