Spectra Breast Flange Set, 16mm, X-Small.Perfect to have on hand as extra parts at home or office, the Spectra 16mm Breast Flange Set helps obtain the proper suction while maximizing the optimum performance of your breast pump. The set features a backflow protector to prevent breastmilk from backing up into the pump motor to keep your milk free from contamination. If double pumping, you'll need to purchase two 16mm Breast Flange Sets.Features & Benefits: Ensures comfort and efficiency while pumping breastmilk Assist with delivering the proper suction and seal Prevents breastmilk contamination Made with BPA/DEHP free materials Easy to clean For use with the Spectra S1, S2, SG, and 9 Plus Breast Pumps 90-day Limited Manufacturers Parts WarrantyContains: One (1) Single 16mm Breast Flange One (1) Backflow Protector One (1) Duckbill Valve One (1) Tubing with Adapter