Durceler Durceler 19mm Flange Insert Compatible with Momcozy S9 S10 S12 Pro bluefair BIOBOO S21 Bellababy NCVI kmaier TSRETE MomMed NaNaLazy NIRGU Onlyeah MomWills Medela Spectra 24mm Breast Pump

Durceler 2 Piece 19mm flange inserts to compatible with Momcozy S9 S10 S12 Pro bluefair BIOBOO S18 S21 S23 Wearable Breast Pump Medela Spectra S1 S2 TSRETE FEISIKE Rainyb Bellababy MiniO NCVI kmaier MomMed NaNaLazy NIRGU Onlyeah MomWills Motif Luna Amada MYA 24mm breast shields It will reduce the 24mm shield nipple tunnel down to 19mm Also compatible with Lansinoh Freemie 25mm cups to reduce it down to 19mm Seamless Compatibility For Optimal Milk Expression Suitable for nipple diameter 1618mmafter a pumping session or measure the circumference of nipple base about 4396 5024mm before a pumping session Great solution for smallnippled mothers using large breast shields Proper nipple tunnel fit is essential for comfort and efficient milk output It can be compatible with Spectra and Medela Freestyle Harmony Sonata and SwingMaxi pumps and other brands REPLACEMENT GUIDANCE Replace every 412 weeks depending on duration and frequency of each pumping session Durable clear and comfortable BPA free made of silicone material Maintain compatibility with most handsfree bra You can use most handsfree bra cups with they original 2425mm detachable shields having this insert inside During operation you need to squeeze slightly to make the Insert fully fit with the shield to achieve the perfect effect