The breast pump flange inserts are made of silicone material, sturdy and useful, can be used for electric breast pump, wearable breast pump, simple and easy to replace, convenient to use. Safe and excellent, simple and convenient, sturdy and practical. Features -Color:White -Material:Silicone -Size:4.60X4.60X3.40cm/1.81X1.81X1.34in - Note: 13mm, 15mm, 17mm, 18mm, 19mm, 20mm, 21mm, 24mm. - Made of silicone material, flange inserts are safe and practical, sturdy and useful, serving for longer period. - Smooth surface, no rough burrs, breast pump flange inserts are excellent and sturdy, not hurting your , comfortable to use. - Fine texture, simple to replace, safe and useful, wearable breast pump flange inserts are practical and excellent. - Excellent performance, simple design, reasonable design, you can use breast pump flange inserts with confidence. - Suitable for wearable breast pump, electric breast pump, simple to use, bring much convenience to you. 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