100% brand new and high qualityOOTDTY  Features:Food grade material, non-toxic and harmless, no peculiar smell, safe to useEnvironmental friendly, washable and reusableUse silicone BPA free which are safe material, no injury to the chest17，19 ，21mm inserts to use with 24 mm detachable shields24mm inserts to use with 27 mm detachable shieldsInsert to use with Breast Pump 24 or 27 mm detachable shields. It will reduce the nipple tunnel down to 17/19/21 or 24 mm.Almost compatible with all major Brands with flange size of 24-27mmTo reduce the existing funnel to smaller sizeIs the best choice for new mothersSpecification:Material: SiliconeSize : app.17/19/21/24mmColor: TransparentOptional Style: 1.17mm 19mm 21mm，2. 24mmQuantity: 1 Pc or 3pcNote:No retail package.Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!Package Contents:1pc x 24mm Flange Insertsor1pc x 17mm Flange Inserts，1pc x 19mm Flange Inserts，1pc x 21mm Flange Inserts