Breastshield Medela PersonalFit Flex 21 mm — MEDELA replacement flange

Medela PersonalFit Flex 21 mm replacement breastshield is a spare flange designed for use with compatible Medela breast pumps that accept PersonalFit Flex components. The 21 mm opening size offers a defined fit aimed at efficient milk expression while maintaining contact comfort. Manufactured to match the geometry of Medela pumps, this replacement part supports hygienic pumping sessions and makes it possible to use a correctly sized flange for single or multiple daily expressions.

Advantages

The PersonalFit Flex 21 mm flange is made to provide consistent alignment and an even distribution of suction across the breast, reducing the need to reposition during pumping. Its flexible rim adapts to individual anatomy, helping to improve milk flow compared with rigid designs. As a replacement part, it permits continued use of Medela electric and manual pumps without compromising compatibility or performance when a different flange size is required.

Suitable for

• Parents who need a 21 mm flange size for comfortable and effective pumping
• Users of Medela pumps that accept PersonalFit Flex components
• Situations requiring a spare or replacement flange for hygiene or wear reasons

Key specifications

• Flange opening diameter: 21 mm
• Material: medical-grade plastic with a flexible silicone rim
• Compatibility: fits Medela pumps designed for PersonalFit Flex accessories
• Intended use: repeated expression of breast milk
• Cleaning: suitable for washing and sterilisation according to manufacturer instructions

How to use

Attach the PersonalFit Flex 21 mm flange to the pump connector following the pump manufacturer’s instructions to ensure a secure fit. Position the flange so the nipple is centered in the opening; a correctly centered nipple improves comfort and expression efficiency. Adjust suction settings on the pump to a comfortable level and monitor for any discomfort; stop and reassess fit if pain or pinching occurs. After use, disassemble and clean the flange according to Medela’s cleaning and sterilisation guidelines before next use.

Usage recommendations

Choose the 21 mm flange only if it matches your measured nipple diameter when measured correctly; using the correct flange size helps maintain milk flow and reduces nipple discomfort. Replace the flange if it shows signs of wear, cracking or loss of flexibility, and follow the pump’s user manual for proper maintenance and sterilisation procedures.