Compatibility: This set can be used with the following breast pumps: Spectra Synergy Gold, Spectra S1, Spectra S2, and Spectra 9 Plus Easy Cleaning: Wash Spectra pump parts after each use with warm soapy water and rinse well, do not wash tubing BPA/DEHP Free: All Spectra pump parts that come in contact with breast milk are BPA/DEHP free, giving you peace of mind about your baby's milk Important: These authentic Spectra pump parts include a Spectra flange, to ensure complete product satisfaction, please measure nipple size and purchase the appropriately sized flange Made For Moms, By Moms: We`ve committed our lives to providing the best breast pumps, accessories, education, and customer care that we can, supporting every mother with the beauty of parenthood Use the Spectra Breast Shield Set to replace your original breast pump parts or to keep an extra set at work. If double pumping, please buy two. The Spectra Breast Shield set is great for our Spectra S1 Plus, S2 Plus, S3 Pro, or 9 Plus breast pumps. Spectra recommends replacing your 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 kit 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. 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.