Flange Inserts for S9 Pro/S12 Pro - 4 Pcs

Customers say these inserts fit seamlessly with various pump models, making them versatile accessories. Many reviews mention compatibility with different brands, from portable to manual options. While some note the material is too soft for their preference, most find them comfy and easy to use. A few customers report sizing mishaps, emphasizing the importance of selecting the correct measurements. Common feedback includes appreciation for the flexible material and smooth insertion process. The set of four pieces is highlighted as a nice bonus. Some users encountered compatibility issues with specific models, so double-checking fit is recommended. Reviews frequently mention how these make the pumping process more comfortable compared to standard options. A handful of customers found them too big or soft for their needs, but the majority express satisfaction with how they slide in and stay in place.