The wearable breast pump flange inserts are made with silicone material, useful and excellent, serving for longer time, suitable for wearable breast pump, electric breast pump, simple to replace, simple and convenient for you. Safe and excellent, useful to use. Features -Color:As Shown -Material:Silicone -Size:4.60X4.60X3.40cm/1.81X1.81X1.34in - Note: 13mm, 15mm, 17mm, 18mm, 19mm, 20mm, 21mm, 24mm. - Made of silicone material, sturdy and excellent, safe and useful, breast pump flange inserts can be used for longer time. - Smooth surface, without burrs, not worry about hurting your , flange inserts are 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 inserts with peace of mind. - Simple design, wonderful workmanship, excellent performance, can be used for wearable breast pump accessories. Package list: 4 x breast pump flange insert 24mm 4 x breast pump flange insert 21mm 4 x breast pump flange insert 20mm 4 x breast pump flange insert 19mm 4 x breast pump flange insert 18mm 4 x breast pump flange insert 17mm 4 x breast pump flange insert 15mm 4 x breast pump flange insert 13mm