Compatible with Pigeon's Mother's Milk Realization baby bottles, and can be used for the 2nd, 3rd generation, my Precious, and T-Ester. Softer than the official nipples. Target age range and nipple hole shape: LL: 9 months and up (Y-cut) (Target age is a guideline and may vary.) My child needed a larger size, so I'm selling these. Used for only one week. Washed, sterilized, and boiled. ※These are not official products!! ・There is no size marking on the back of the product, so please be careful when storing them. If you're unsure, identify them by the shape of the nipple hole. ・The tip will be folded for shipping, please be aware.