Materia: Polypropylene, Silicone Color: Pink Size:30*75mm How to use: cover the nipple, press the ball, release, and press the ball, and release until the nipple come out. Feature: - Improve nipple retraction, strong and beautify nipples. - Restore the nipples defects for normal smoothly - For breastfeeding. - Easy to use, simply place the sucker over nipple and pump the bulb until the nipple is erect. - It can be boiled, sterilized by microwave or disinfected by liquid medicine. Package include: 1 X Nipple Puller Note: There is 2-3% difference according to manual measurement. Please note that slight color difference should be acceptable due to the light and screen.