unused 13mm silicone flange inserts bought from lactation hub. 2 sets of 2 meaning 4 total.
12Pcs Flange Inserts 13/15/17/19/21Mm for 24Mm Flange/Shield of Most Pump
10PCS Breast Pump Flange Inserts 13/15/17/19/21mm for 24mm Flange/Shield, Soft
Nuliie 10PCS Flange Inserts 13/15/17/19/21Mm for 24Mm Flange/Shield of Most
Flange Inserts 10PCS 13/15/17/19/21Mm for 24Mm Flanges/Shield, Flange Sizing Kit
Nuliie 10PCS Flange Inserts 13/15/17/19/21Mm for 24Mm Flange/Shield of Most Pump
