Breast Pump Parts Accessories Wearable Flange Insert 17mm Compatible with S12 S9 S10 S12A S18 S21 S23, 2 Pcs

["PREMIUM & COMFORT: we're committed to producing the most premium products while also minimizing our impact on the environment. That's why we use 100% premium natural silicone material to create premium breast pump parts with impressive quality. They are clean and pollution free, safe for moms and babies, brings mom the best breastfeeding experience.","SCIENTIFIC& EFFICIENT DESIGN: dual channel anti-backflow design, gaseous and milk separated completely, not pollute the motor, no milk spilling and waste. One-way duckbill design, anti-overflow, milk only goes up, clean and pollution free.","HAND-PACKED WITH KINDNESS: We believe that the quality of product begins with the kindness and care we put into packaging it. That's why each box of breast pump accessories are hand packed with kindness and attention to detail, ensuring that every parts is of the highest quality and ready for you to enjoy. Super soft BPA free silicone material, brings you the maximum relaxed pumping and wearing experience.","EASY TO INSTALL AND CLEAN: only 4 steps installing easily and complete in minutes. Can be easily cleaned up in soaking or boiling water within 1-5 minutes.","CONVENIENT & MULTI OCCASION USE: small and portable carry, without burden when going out. Suitable for variety of occasions."]