Elvie Pump Breast Shields - 2 Pack Nipple Shield Flange for Pumping Breast Milk BPA Free Breast Shells Breast Pump Bra Compatible (Shields (21mm))

COMFORTABLE: Elvie's mission is to create smarter technology and convenient baby essentials for women. Unique fitting system and directions ensure greater comfort, correct nipple alignment and effective suction., SAFE: Made of the highest quality BPA free plastic (Eastman Tritan EX401) to ensure durability and prevent discolouration., MEDIUM: 24mm is the midrange Breast Shield size available for Elvie Pump. The measurement of the base of your nipple width should fall between 18mm and 21mm for the best fit., CONVENIENT: Dishwasher safe for easy cleaning and convenience.