Spectra SG Premium Accessory Kit, 28mm.If youre needing a full set of replacement parts or want to have an extra set on hand for home or work, the Spectra SG Premium Accessory Kit 28mm is perfect for busy moms. The Kit replaces your original Spectra breast pump parts and helps maintain the proper suction and efficiency for all Spectra pump models. If double pumping, we recommend getting two kits.Features & Benefits: Full replacement parts & accessories for single pumping Ensures comfort and efficiency while pumping breastmilk Assist with delivering the proper suction and seal Prevents breastmilk contamination Milk Bottle suitable for fridge or freezer 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 28mm Breast Flange One (1) Milk Bottle with Nipple, Cap, Disc & Cover One (1) Backflow Protector One (1) Duckbill Valve One (1) Tubing with Adapter