I purchased this on Amazon, but I'm selling it because I didn't use it. Product Description ★お得パック (Otoku Pack - Value Pack)★ Yellow breast shields x 4, white membranes x 8 ★対応機種 (Taiou kishu - Compatible Models)★ Medela / Swing / Symphony / Harmony Manual Breast Pump / 2-Phase Expression ★純正同等の性能 (Junsei doutou no seinou - Equivalent Performance to Genuine)★ These are new, compatible breast shield parts that can be used the same way as the genuine ones. ★快適利用 (Kaiteki riyou - Comfortable Use)★ BPA-free and DEHP-free. Can be sterilized with steam or boiling. ★安心安全 (Anshin anzen - Safe and Secure)★ Nene Supply products are manufactured to meet the standards set by the U.S. Food and Drug Administration (FDA).