CONTENTS: 2ct 27mm flanges and 2ct duckbill valves compatible with Spectra S2, Spectra S1 and Spectra 9 Plus breastpump. Made by Maymom. Not Original Spectra Flanges, Spectra Duckbill Valve. Can use Maymom flange for Spectra pump or Maymom duckbill valve for Spectra pump parts. Made by Maymom, not by original spectra company. Maymom is not affiliated with Uzinmedicare, the trademark owner of spectra.

IMPORTANT! Not a direct alternative to Spectra 28mm Flange: Maymom 27mm flange features a smoother curvature and a longer, roomier flange tunnel to help reduce nipple pain caused by contact with the back of the flange. Due to design differences, some customers report that our 27mm feels larger than Spectra 28mm. If you're seeking a smaller flange than Spectra 28mm, this product may NOT meet your expectations. Maymom also offers 25mm flange, which is smaller than Spectra 28mm and larger than 24mm. The 25mm flange is recommended for moms with a nipple diameter of 23-24mm after pumping. Please measure your nipple size before purchasing. A detailed explanation is provided in the product images.

MAYMOM DUCKBILL VALVES features "easier to plug in and remove", "durable quality" and "color options"

MAYMOM FLANGE can work with Spectra wide-neck bottle (wide-mouth bottle), Compatible with Avent bottle, and Maymom widemouth bottle. Available Flange sizes:13mm, 15mm, 17mm, 19mm, 21mm, 24mm, 25mm, 27mm, 28mm, 29mm, 30mm, 32mm.

BPA/DEHP FREE. FDA compliant for food contacts. Tested by independent labs for safety. Test report online available for reference. Products in retail pack sealed by manufacturer; NO problem with dishwasher top rack, water steam cleaning, boiling water or microwave-steam bags.

COMPATIBLE AND INTERCHANGEABLE with Spectra pump parts. Maymom pump parts perform the same suction power as OEM parts, Spectra S2 pump parts, Spectra S1Plus accessories.