Non-toxic, odorless, high transparency, not yellowing Material soft, elastic, not deformed Long useful life, no cracking. Cold-resistant and high temperature resistance. Advantage: Soft design at skin contact surface with corrector, the soft silicone can protect your nipples from injury during long time wear. Productor Features: 1. Easy to use: no need to use other auxiliary tool, gently press can make it suck up firm,don't drop 2. You can control the suction according to personal comfort: slightly press the top (small suction),press down half (medium suction), all press down (the maximum suction) 3. Comfy skin touch: Imported food-grade silicone, soft and comfortable 4. Not allergies: High quality material 5. Excellent air tightness, Super suction 6. Simple disinfection: silicone material have 120 degree heat resistant, same disinfection methods with baby pacifier. Blanching for a few minutes,convenient and clear for secondary use Material: Silicone Color: Transparent Standards: inner diameter: 18mm Note: 1.Please allow 1-3cm error due to manual measurement. pls make sure you do not mind before you bid. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package include: (No retail package) 2 Pcs ×Nipple Corrector