I never use it as it doesn't fit
Medela Breast Pump Shields, PersonalFit Breast Shields Size Extra Large, 30mm,
17mm Flange Inserts for Medela Breast Pump, 2pcs Medela Nipple Shields Compatible with Pump in Style, Symphony, Freestyle, Sonata, Maxflow, Lansinoh Signature Pro, Hand Pump Replacement Parts
Medela PersonalFit Flex Breast Shields - More milk and more comfort while pumping, for use with any Medela breast pump, size S
Medela PersonalFit Flex Breast Shields - More Milk and More Comfort While Pumping, for use with Any Medela Breast Pump, Size L
19mm Flange Inserts for Medela Breast Pump, 2pcs Medela Nipple Shields Compatible with Pump in Style, Symphony, Freestyle, Sonata, Maxflow, Lansinoh Signature Pro, Hand Pumpt Parts for Breastfeeding
PumpMom 21mm Breast Pump Shields Flanges for Medela, Replace Flange Compatible with Medela Breast Pumps PersonalFit, Freestyle, Maxi, Freestyle Flex Connector
