1、Suitable For: Wearable breast pump flange compatible for S9, S10, S12, S4DW wearable breast pump, pump more milk in the same amount of time. 2、Better Fitting: Breast pump flange is better fit the shape of breast, help your nipple would not rub or feel squished inside the flange tunnel while pumping. 3、Easy Cleansing: Silicone breast pump flange inserts can be washed in dishwasher, after being cleaned, all milk stains are removed and the flanges looks new. 4、Soft Silicone: Breast pump flange inserts made of silicone material, soft and skin friendly, high temperature resistance, which is safe for mothers to use. 5、Regular Replace: It is recommended to replace breast pump parts every 1 to 2 months, deformed parts can result in suction failure or fluid leakage. Item Type: Breast Pump Flange Inserts Material: Silicone Fitment: Fit for S9, S10, S12, S4DW wearable breast pump 1 x Breast Pump Flange Inserts