Ameda Dual HygieniKit Milk Collection System Mode D'emploi page 11

To use the Flexishield areola stimulator:
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E N G L I S H
1. Insert Flexishield stimulator into breast flange. Flexishield
stimulator's rings should touch inside walls of flange.
2. Attach Flexishield stimulator to flange by pushing edge over
rim of flange. Use palm or thumb and forefinger.