Spectra breastfeeding acessory kit supplies are compatible with Spectra S1, S2, 9 Plus, and Synergy Gold electric breast pumps. It is recommended to wash Spectra pump parts after each use with warm soapy water and rinse well; however, do not wash tubing. All Spectra breastfeeding supplies in this kit that come in contact with breast milk are BPA/DEHP free, giving you peace of mind about the baby feeding supplies you use. This set of Spectra pump parts includes a Spectra flange; to ensure complete product satisfaction, measure nipple size and purchase the appropriately sized flange for your Spectra breast pump and breastfeeding accessories. Made for Moms, by Moms, we`ve committed our lives to providing the best breast pump, breastfeeding supplies, milk bottles, baby accessories, education, and customer care that we can, supporting every mother with the beauty of parenthood.