Use the Spectra Premium Accessory Kit to replace your original Spectra breast pump parts or to keep an extra breastfeeding support set at hand when you need it. This kit of breastfeeding essentials includes a 28mm breast shield, a 5oz Spectra bottle with lid, a disk, a cap, a backflow protector, a duckbill valve, a nipple and one piece of tubing. This Spectra breast pump accessories kit is compatible with Spectra S1 Plus, Spectra S2 Plus, and Spectra 9 Plus breast pumps. Spectra recommends replacing your breast pump parts every 3-6 months for optimal use. If you are needing a full set of replacement parts or want to have an extra set on hand for home or work, this set of Spectra breast bump accessories is for you.Owned and operated by fellow moms, lactation consultants and registered nurses, Spectra is committed to supporting every mother on the beautiful journey of breastfeeding with our breastfeeding essentials. From our unique Natural Nursing Technology to our one-of-a-kind customer care, you can count on Spectra to be right there with you, every step of the way. We are moms. We are nurses. We understand.