I purchased this new on Mercari (as a spare nipple) but never used it, so I am listing it for sale. Direct-attach nipple, general newborn SS size x 1, new and unused (authentic Pigeon, Mother's Milk Realization, for hospital and clinic use bottles) Renewed product Can be attached to KR-50, KR-100, and KR-200 bottles for hospital and clinic use. Please be careful to ensure compatibility. I will package it to minimize thickness, but it is silicone, so it will return to its original shape. Please rest assured.