Description The breast pump flange inserts are made of silicone material, sturdy and useful, compatible with electric breast pumps and wearable breast pumps. Simple and easy to replace, convenient to use. Safe, excellent, simple, convenient, sturdy, and practical. Features - Color: As Shown - Material: Silicone - Size: 4.60 x 4.60 x 3.40 cm / 1.81 x 1.81 x 1.34 in - Note: Includes sizes 13mm, 15mm, 17mm, 18mm, 19mm, 20mm, 21mm, 24mm - Made of silicone material, the flange inserts are safe and practical, sturdy and durable for long-term use - Smooth surface with no rough burrs, the breast pump flange inserts are well-made and comfortable to use, gentle on the skin - Fine texture, easy to replace, safe and functional, ideal for wearable and electric breast pumps - Excellent performance with a simple and thoughtful design, providing reliable use - Compatible with wearable breast pumps and electric breast pumps, easy to use and brings added convenience Package List 1 x Breast Pump Flange Insert 24mm 1 x Breast Pump Flange Insert 21mm 1 x Breast Pump Flange Insert 20mm 1 x Breast Pump Flange Insert 19mm 1 x Breast Pump Flange Insert 18mm 1 x Breast Pump Flange Insert 17mm 1 x Breast Pump Flange Insert 15mm 1 x Breast Pump Flange Insert 13mm