Features: Nipple corrector: The soft silicone can protect your nipples from injury during long time wear. Very safe: This is a physical redress correction, which is no side effects, safe and painless. Easy to use: No need to use other auxiliary tool, just gently press can make it suck up firm, and wont drop. Self control: You can control the suction according to personal comfort, slightly press the top, press down half or all press down. Non-toxic material: Made of natural silicone, it is soft and elastic. Specification Material: Silicone Inner diameter: about 15mm/0.59 inch Inner height: about 20mm/0.78 inch Package List: 2 Nipple Corrector Note: Silicone material has 120 degree heat resistant, same disinfection methods with baby pacifier. Blanching for a few minutes,convenient and clear for secondary use.