Photo 1 of 8PCS Flange Sizing Kit 15/17/19/21mm for 24mm Flanges/Shield, Soft Silicone Flange Insert Compatible Momcozy/Spectra/Medela Breast Pump, Breast Pump Essential kit(with Nipple Rulers and Storage Bag)

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Photo 1 of 8PCS Flange Sizing Kit 15/17/19/21mm for 24mm Flanges/Shield, Soft Silicone Flange Insert Compatible Momcozy/Spectra/Medela Breast Pump, Breast Pump Essential kit(with Nipple Rulers and Storage Bag)Photo 2 of 8PCS Flange Sizing Kit 15/17/19/21mm for 24mm Flanges/Shield, Soft Silicone Flange Insert Compatible Momcozy/Spectra/Medela Breast Pump, Breast Pump Essential kit(with Nipple Rulers and Storage Bag)