Youha Silicone Massage Cushion is an insert that can be placed inside the funnel of the 24mm breast shield to reduce the nipple tunnel size to 21mm. It can be used with the 24mm breast shield ofYouha The One Double Electric Breast Pump. Made of safe food grade silicone, it is very gentle on the skin and provides more comfort and cushion for mothers breast when pumping. Silicone Massage Cushion insert for 24mm breast shield Reduces nipple tunnel size from 24mm to 21mm Provides cushion on breasts, gentle and comfortable for pumping mothers ForYouha The One Double Electric Breast Pump (click here) only. Includes 2xSilicone Massage Cushion.