Description Thebreast pump flange inserts set are made of silicone material, durable and useful, could be used for electric breast pump, wearable breast pump, simple and easy to replace, convenient to use. Safe and practical, simple and convenient, universal and useful. Features -Color:Transparent -Material:Silicone -Size:6.00X6.00X1.50cm/2.36X2.36X0.59in -Size:4.80X4.80X3.00cm/1.89X1.89X1.18in - Note: 13mm, 15mm, 17mm, 19mm, 21mm, compatible with s12 wearable breast pump - Made of silicone material, safe and practical, durable and useful, serving forlong period. - Smooth surface, no rough burrs, excellent and sturdy, not hurting skins, comfortable to use. - Fine texture, simple to replace, universal and useful, flange inserts set for breast pump ispractical and excellent. - Good performance, simple design, classic color, reasonable design, you can usebreast pump flange inserts set with confidence. - Suitable for wearable breast pump, electric breast pump, simple to use, bring much convenience. Packing list1 x breast pump flange insert 21mm1 x breast pump flange insert 19mm1 x breast pump flange insert 17mm1 x breast pump flange insert 15mm1 x breast pump flange insert 13mm2 x duckbilled valves2 x silicone diaphragms