Pack of 4, Suitable for mon whou0026#39;s nipple diameter less than 1.3cmnThe maximum temperature is 180 degrees. Service life: 2-3 monthsnFor latch on difficulties or flat and inverted nipples to help continue breastfeedingnUnique shape to fit mother with small nipplesnSilicone,Imported,Protects sensitive nipples during breastfeeding,Soft nodules gently stimulate your milk flow. BPA freenNipple shields can be an effective tool for professionals and moms to manage infants with latch on problems, for moms with overactive let downs or for flat, inverted and sore nipples. Our nipple shields enable continued breastfeeding without interruption until these problems are resolved. Special design for closer contact with baby. Made without BPA safe for mom and baby.