About the Product : 2 BACKFLOW PROTECTORS Use with SPECTRA S1, SPECTRA S2, SPECTRA 9PLUS Breastpump. Including 2 Large Cases, 2 Small Cases, and 2 Silicone Diaphragms. Replacement for Spectra Backflow Protectors. ORIGINAL SPECTRA PARTS. CLOSED SYSTEM. No contact between milk and tubing, which minimizes mold growing and protects your pump motor. Spectra is a brand of Korea. This product is produced in Korea. IN RETAIL PACK sealed by manufacturer for best protection and hygiene.