Specifications: This product is a scientific physical nipple correction device, which can be used for easy correction of inverted, flat, short nipples. One-piece molding design makes it easy for you to wash and clean it. Alcohol disinfection can be done after use, but it is not resistant to high temperature boiling. The item has smooth surface which is comfortable to use and will not hurt the skin. How to use: 1.Insert the syringe into the end of the correcter fixing valve to connect with the nipple correcter. 2. Appropriately apply some lubricating milk such as aloe gel around the nipple (suck it tighter), put the nipple into the ring plastic sleeve on the correcter, and use the other hand to draw out the air with the syringe to produce gentle suction. And the suction power is subject to comfort. 3. Pull out the syringe gently, the small and light correcter can be used even if you wear clothes. 4. To remove the correcter, just use the syringe to advance the air, and the suction will disappear to remove the correcter. Item Name: Nipple Correcter Material: PP, Silicone Applicable People: Pregnant Mothers, Girls, Inverted Nipples Men Feature: Safe, Effective, Fine Craftsmanship, Pregnant Supply Size: Inner Diameter 1.5cm, Outer Diameter 3cm(Approx.) Notes: It should not be worn for more than 1 hour each time, 3 hours per day is enough. Due to the light and screen setting difference, the items color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Syringe 2 x Nipple Correcters 2 x Vacuum Valve 1 x Storage Box