KIT CONTENTS TwoPiece Flanges 28mmX2 Duckbill Valves X2 Backflow Protectors X2 Tubes X2 Bottles with TwoPiece Travel CapX2 The flange includes A separable shield and A widemouth connector This 24mm Flange is suggested for mothers with nipple diameter 2627 mm AFTER pumping All products compatible with Spectra S2 Spectra S1 Spectra 9 Plus Nipples and Dome Caps are NOT included in this kit TWOPIECE TRAVEL CAP OF MAYMOM BOTTLE The cap contains a rewritable surface to datename for daycaredaily use Regular ball pen to write and soapy water to clean MAYMOM DESIGN OF SEPARABLE FLANGE FOR SPECTRA USERS This flange is made of a separable shield and a widebase connector specifically created for Spectra Pump With the Maymom widemouth connector you can easily switch to most comfortably fitted shields Shield sizes available 13 15 17 19 21 23 24 25 27 28 30 32mm Twopiece flange system features easy to take apart and reassemble easy detachment for thorough cleaning accommodations for most hands free pumping bras on the market MAYMOM PUMP PARTS PERFORM AS WELL AS OEM PARTS Compatible and interchangeable with Spectra pump parts Same suction power as OEM parts Ideal replacement parts for Spectra Flanges Spectra Duckbill Valves Spectra Backflow Protectors Spectra Tubings Spectra Bottles Wide Mouth Not original Spectra S2 Accessories Not original Spectra S1 accessories Not original Spectra pump parts COMPLIANCE WITH FDA REGULATIONS FOR PLASTIC MATERIAL Material does not contain BPA Can be sanitized with water steam boiling water or microwavesteam bags