Maymom Narrow to Wide Bottle Thread Changer (Medela Pump to SpectraAvent Bottles)

Maymom Narrow to Wide Bottle Thread Changer is a bottle adaptor that enablesMedela Breast Pumps (Pump in Style, Lactina, Symphony, Swing) to pump intoAvent and SpeCtra wide-mouth bottles. Narrow to wide conversion kit – connects narrow-neck flanges (Medela) to wide-neck bottles (Avent, Spectra) Enables Medela Breast Pumps (Pump in Style, Lactina, Symphony, Swing) to work with Avent and SpeCtra wide-mouth bottles (refer to product images for compatible bottles) Includes 4 conversion rings plus 4 sealing rings (inside the converter) to avoid leaks Pump directly into Avent and Spectra Wide-mouth bottles. BPA free, dishwasher safe, retail pack, sealed by manufacturer. Also compatible pumps: Evenflo Comfort Select, Ameda Purely Yours, Lansinoh Double Electric, Playtex Embrace, Dr. Brown’s Natural Flow Electric/Manual. NOTE: DOES NOT work with Avent VIA storage cups. DOES NOT work with Medela Sonata flange DOES NOT work with the new Medela Flex flange connector DOES NOT work with Avent Natural glass bottles as they are are made with thicker wall. Please trim off part of the thread to fit. See the product images for details. Click here to shop for O-Rings