The PVC tubing that comes with Medela's Pump in Style will melt in steam during sterilization. Furthermore, when it gets dirty, and can't be washed by water, it is time to install a new one for the safety of your baby. This product is a retail package of a pair of two NEW tubings designed for Medela's PIS breastpump, released after July 2006. If you don't know if this tubing fits your pump, see the photos. The tubing is (1) One soft end & one adaptor (2) will not melt during sterilization (3) Smooth, semi-clear plastic tubing (4) Made to replace Medela's #8007212.