Imani Inserts Are Exclusively Designed To Fit Right Inside Your Imani I2 Breast Pump. Available In Sizes 17Mm,Sterilize Before First Use By Submerging The Inserts In A Deep And Wide Pot Of Boiling Water For 3-5 Minutes. The Inserts Should Be Fully Submerged In Water And Not Touch The Bottom Or Sides Of The Pot. Do Not Sterilize And Avoid Using High Heat After Initial Sterilization.Hand Wash In Warm Soapy Water Then Rinse Clean After Subsequent Uses. Using Cold Sterilization Or Uv Sterilization Is Also Permissible.Do Not Wash Inserts In The Dishwasher.Replace Every 2-3 Months, Depending On The Frequency Of Use.