It is well known that using the correct breastshield size is important for your pumping comfort and optimal milk supply. it is also known that two-piece design offers easy to clean and wider compatibility with hands free bra advantages. the name brand companies do not offer 21 mm breastshield (shields). maymom is the first company world-wide to offer 13, 15, 17, 19, 25, 26, 28 and 32 mm internal diameter shields to fit mothers of special needs. maymom has 7 years experience in making breast pump parts. BOX CONTAINS 2x shields (21 mm, suitable for mothers with nipple diameter after pumping 19-20 mm)

Made of bisphenol-a (bpa)/dehp-free material and all components are steam safe for sterilization. Retail poly-bag packed; sealed by the manufacturer - maymom, not original medela parts. Compatible with medela pumps (pump in style, lactina, symphony, swing, mini electric freestyle, swing maxi, sonata, freestyle flex and harmony). note: connectors are not included in this listing. 2x shield, 21 mom, suitable for mothers with nipple diameter after pumping 19-20 mom, compatible with medela pumps.