Feature: 1. Food grade silicone material, no odor, safe and durable, no side effect. 2. Physical traction, gently pinch, and can be used to massage correction mammary gland. 3. Integrated designs, gentle press the upper part to form weak pressure, easy to wear, deep press the upper part to form strong pressure, tight to wear. 4. Portable and small, easy to correct nipple, including 4 pairs of the package. 5. Generally need to continue to use 1‑6 months, in order to permanently correct the inverted nipple. Specification: Condition: 100% Brand New Item Type: Nipple Corrector Material: Food Grade Silicone Suitable: for Pregnant women, lying-in woman, girls Note: Nipple corrector is suitable for use before pregnancy, if your chest is not too sensitive, you can also use in the first six months of pregnancy, also can achieve permanent correction, the third trimester (after 24 weeks) do not use, You can stop using the nipple corrector once your milk is full drained. Your baby will find the nipple and pull it out to suckle. This corrector will long lasting effective after the end of lactation.. Package List: 4 x White Box 8 x Nipple Corrector