Quality & performance: Replacement tubing makes it easy to ensure optimal performance for your breast pump Easy & convenient: Have an extra set of tubing available when you need it Works with Medela's Pump In Style Advanced Breast Pumps, including the Advanced Starter Set and Advanced Personal Double Breast Pumps*: Designed to work best with your Medela breast pump - *(manufactured after July 2006); also works with Pump In Style Original Breast Pumps (obsolete)