John Guest PM664E - 6mm O/D x 4mm O/D Stem Reducer

The John Guest PM664E is a stem reducer fitting designed to connect two tubes of different sizes. Specifically, it is a 6mm O/D (outer diameter) x 4mm O/D stem reducer, meaning that it has a 6mm outer diameter on one end and a 4mm outer diameter on the other end.

This fitting is part of John Guest's push-fit range, which means that it can be easily installed without the need for any tools or special skills. The PM664E stem reducer is made of high-quality materials, such as food-grade acetal and EPDM o-rings, and is suitable for use with both hot and cold water and beverages.

Overall, the John Guest PM664E stem reducer is a reliable and convenient fitting that can help you connect tubes of different sizes in various plumbing and fluid transfer applications.