This six-piece pump part set includes two 20mm flanges and four duckbill valves, designed as replacement components for Spectra S1, S2, S9 Plus, and Synergy Gold breast pumps. The flanges are crafted from firm yet body-friendly plastic, offering a smooth interior surface to facilitate comfortable milk expression. Each duckbill valve is molded from flexible silicone, providing a reliable seal that opens and closes during pumping cycles to maintain consistent suction and prevent backflow. The set is manufactured with attention to dimensional accuracy, ensuring each piece fits securely onto the pump body without wobbling or air leaks.

The 20mm flange size suits individuals with smaller nipple diameters, promoting a snug but gentle fit that may help optimize milk output. These parts are sold as replacements only and are not original Spectra accessories, though they are built to meet equivalent functional standards. The valve material retains its elasticity through repeated use and cleaning, resisting permanent deformation under normal conditions. The flange surface is polished to minimize friction, while the valve tip design supports efficient vacuum release.

This kit offers a practical solution for users who need to refresh worn components, extend pump service life, or maintain hygiene by rotating parts regularly. The set is packed in a resealable poly bag to keep items dust-free before use. Each component can be washed with warm soapy water or placed in a steam sterilizer. Users should verify compatibility with their specific pump model before purchase.

The construction balances durability with flexibility, making it suited for daily pumping routines. Its affordable price point makes it a cost-effective maintenance choice compared to buying separate pieces. The components have a simple, no-fuss design that requires no special tools for installation or removal.

Suitable for mothers who already own a compatible Spectra pump and wish to replenish their accessory inventory without overspending. The set does not include tubing or bottles, focusing solely on the flange and valve pieces that typically wear out fastest. This targeted assortment covers the most frequently replaced parts, helping users maintain consistent pumping performance over time.