I never use it as it doesn't fit
Medela Breast Pump Shields, PersonalFit Breast Shields Size Extra Large, 30mm,
19mm Flanges for Medela Pump, 2-Pack Breast Nipple Shields Compatible with Pump in Style, Symphony, Freestyle, Sonata, Maxflow, Signature Pro, Medela Breast Pump Accessories Parts
18mm Flanges for Medela Pump, 2-Pack Breast Nipple Shields Compatible with Pump in Style, Symphony, Freestyle, Sonata, Maxflow, Signature Pro, Medela Breast Pump Accessories Parts
21mm Flanges for Medela Pump, 2-Pack Breast Nipple Shields Compatible with Pump in Style, Symphony, Freestyle, Sonata, Maxflow, Signature Pro, Medela Breast Pump Accessories Parts
23mm Flanges for Medela Pump, 2-Pack Breast Nipple Shields Compatible with Pump in Style, Symphony, Freestyle, Sonata, Maxflow, Signature Pro, Medela Breast Pump Accessories Parts
22mm Flanges for Medela Pump, 2-Pack Breast Nipple Shields Compatible with Pump in Style, Symphony, Freestyle, Sonata, Maxflow, Signature Pro, Medela Breast Pump Accessories Parts
