【Perfectly Compatibility with Spectra Pumps】Same good quality as OEM Spectra replacement parts. Compatible with Spectra S1, Spectra S2, Spectra 9 Plus breast pump. Suitable for mothers whose nipples are 22-23 mm in diameter after breastfeeding. 【Breast Pump Part Kits】 Contains 2pcs x 24mm Flange/Breastshield. They are compatible with Spectra wide mouth bottles, AVENT PP/Glass bottles, Avent Natural PP/Glass. Note: They are Not compatible with MOST wide mouth bottles and Not Original Spectra Flanges. 【Improving Milk Suction Efficiency】The upgraded flange adopts soft rim thickening design, smooth angle and long tunnel, creating better fit and promoting effective during pumping. 19mm, 21mm, 24mm different flange sizes available, suitable for most breastfeeding mothers. 【Safe Food Grade Material】Made from 100% food-grade material, not contain BPA and skin-friendly, safe for both babies and moms. All replacement parts are securely sealed in environmentally friendly bags and packaged in a beautiful box. 【Easy to Clean】All breast pump flanges can be cleaned easily and quickly to help moms pump more efficiently. For example, they can be sanitized with water steam, boiling water or microwave-steam bags. We recommend replacing the flange every 2-3 months to maintain optimal function. 24mm Flange Pump Parts Compatible with Spectra S1/S2/Synergy Gold /9Plus Breastpump, Replacement Pump Parts for Spectra Include 2pcs Wide Mouth 24mm Flanges, Not Original Spectra Accessories