PIS's tubing is not easy to clean. 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 tubing made 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) Adapter color: pale yellow (3) Smooth, clear plastic tubing (4) Made to Medela's #8007212 specifications.