AFTERMARKET PUMP PARTS FOR SPECTRA S2 SPECTRA S1 SPECTRA 9 PLUS BREASTPUMPS Made by Maymom Not Original Spectra Parts Inc 2 small 21mm Flanges 2 Backflow Protectors and 2 Tubing Valve or duckbill is NOT included in this listing but you can use many valves on the market eg spectra valve duckbill or medela valvemembrane The flanges connect with WIDE MOUTH bottles like Avent bottles Maymom wide mouth bottle and spectra wide mouth bottles AFTERMARKET PARTS MADE BY Maymom Not Original Spectra S2 accessories INTERCHANGEABLE WITH SPECTRA PARTS All parts are interchangeable with Spectra Pump Parts Can be used with Spectra flange Spectra backflow protector Spectra valve Spectra bottles and Spectra tubing USED WITH WIDEMOUTH BOTTLES Use this kit with Spectra bottles Avent bottles and Maymom wide mouth bottles DOES NOT work with OTHER WIDE NECK BOTTLES example Lansinoh bottles Dr Brown Wide CLOSED SYSTEM No milk will enter the tubing or motor VARIOUS and WIDE RANGE FLANGE SIZE AVAILABLE Maymom MyFit series of flanges offer 13mm 15mm 17mm 19mm 21mm 23mm 24mm 25mm 27mm 28 mm 30mm 32mm size options Maymom cares for each mom You can find the flange that is the best fit for your pumping comfort and efficiency Refer to size selection guide in product photo to choose the right size for you or consult a lactation consultant before purchase RETAIL PACK Nicely packaged in sealed retail bagcontainer All parts can be sterilized with water steam microwave steam bag or boiling water NO BPA Tested by independent labs for safety