Features: Using steps: 1. Use the pintail comb to separate a small strand of slightly damp or dry hair. 2. Wrap it on the rods and fix it with the shells. 3. Maintain it for 30 minutes to 1 hour. 4. Use a hairdryer and the wave will form faster. 5. You can spray some styling spray or hair gel products to make the curling more durable. Specification: Material: plastic, stainless steel Single hair roller: approx. 2.68 x 1.18 inch/ 6.8 x 3.0 cm Steel pintail comb: approx. 8.27 x 0.98 inches/ 21 x 2.5 cm Color: pink Package include: 12 x Large size hair rollers 1 x Pintail comb Warm note: Pointed parts include, please use it carefully and keep away from little kids. Manual measurement, please allow slight errors on size. The colors may exist slight difference due to different screens. Comb your hair before using the curler and moisten it with water or spray to make the hair a little damp.