Maymom Conversion Kit Compatible with Medela Sonata, Style Flex Pump to Use Phillips Avent Classic Bottles Natural PP Bottle Spectra Wide Mouth Thread Changer Converter

Enables Breast Pump Flanges (Sonata, Pump in Style, Pump in style with MaxFlow, Lactina, Symphony, Swing, Freestyle Flex) to be compatible with Avent and SpeCtra wide-mouth bottles (Note: This ring WILL NOT be compatible with Avent VIA storage cups;). Compatible with Medela Sonata Pump, and Compatible with Medela Freestyle Flex Pump 3rd Generation Bottle Converter adapted for Sonata pump and Freestyle Flex Pump. Includes 2 conversion rings plus 2 sealing rings (inside the converter) to avoid many leaking events. You can pump directly into Avent and Spectra Wide-mouth bottles. NOTE: We have just discovered that some newer batches of Avent Natural glass bottles are made with thicker wall. The adapter will not fit as is. Please trim off part of the thread to fit. See the photos for details. BPA free, dishwasher safe, retail pack, sealed by manufacturer. Also Adapts to: Evenflo Comfort Select, Ameda Purely Yours, Lansinoh Double Electric, Playtex Embrace, Dr. Brown's Natural Flow Electric/Manual.