Spectra-Compatible 21mm Kit

A complete replacement set for Spectra S1, S2, 9 Plus, and Synergy Gold breast pumps, comprising a 21mm flange, duckbill valve, backflow protector, tubing, and bottle — all constructed from premium medical-grade silicone. Total kit weight is light for portability, and dimensions align exactly with factory tolerances (±1–3cm measurement variance acknowledged). No additional accessories or adapters are included — only the five core functional components required for full system refresh. The duckbill valve opens smoothly under low vacuum and seals tightly at rest, preserving suction strength across multiple pumping cycles. Paired with the backflow protector, it forms a dual-layer defence against moisture migration — protecting both user hygiene and long-term pump reliability. The 21mm flange provides targeted comfort for petite or recovering nipples, promoting natural let-down and reducing session fatigue. All parts feature smooth, non-porous surfaces and minimal crevices. Tubing has uniform wall thickness and gentle flexibility — enabling secure attachment without excessive force or risk of splitting. Cleaning requires only warm soapy water or standard sterilisation methods; no special tools or brushes needed.