The wearable breast pump flange inserts are made with silicone material, useful and durable, serving for long time, suitable for wearable breast pump, electric breast pump, simple to replace, simple and convenient for you. Safe and excellent, universal and useful. Features -Color:As Shown-Material:Silicone-Size:4.60X3.40X3.40cm/1.81X1.34X1.34in- Note: 13mm, 15mm, 17mm, 19mm, 21mm.- Made of silicone material, durable and excellent, safe and useful, breast pump flange inserts can be used for long time. - Smooth surface, without burrs, not worry about hurting your skin, safe and useful. - Can be used for electric breast pump, wearable breast pump, simple and convenient to use. - Useful function, reasonable design, useful and safe, you can use flange insertswith peace of mind. - Simple design, wonderful workmanship, excellent performance, can be used for wearable breast pump accessories. Packing list: 1 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 13mm