1) If using these compression fittings with a tube material that has a Durometer of 95A or softer, a tube support will be necessary in order to properly secure the tube within the fitting. An example of a tube support for the 6 mm fittings can be found here and a tube support for the 8 mm fittings can be found here.

2) If using a tubing softer than 95A, we tested and recommend Viton® fluoroelastomer tubing with a Durometer of 75A. Here is a link to the 6 mm OD tubing and here is a link to the 8 mm OD tubing.