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By certification 
Product name：Standard caliber baby nipple |
Model：BY-NJ001 |
Size：ID 20mm, OD 37mm, H 37mm |
Weight：4g |
Size：S M L + |
Age group：0-3 months and above |
Feature：
1.Design of one-way ventilator to expel excess air and reduce gastrointestinal discomfort in babies.
2.Excellent flexibility, safe material, soft touch, liquie silica gel.
3.BPA free, high temperature resistance 120 degrees, boiling water disinfection.
4.Imitate breast milk shape, give baby as safe as mother.
http://www.baiyasilicone.com/
