A series of specialty tube fittings with exceptional sealing under low and medium pressure, designed for applications sensitive to shock and vibration. 

All-Purpose Low and Medium Pressure tube Fittings - View 3d Animation

Sealastic® Fittings provide a tight, leak resistant connection on many types of metal tubing -- including copper, aluminum, Monel, thin-wall steel, stainless -- as well as plastic tubing. They are designed for low and medium pressure systems. Because of their flexible, cushioned seal, Sealastic® Fittings are particularly suited to automotive and heavy equipment applications where vibration, high speeds and mechanical shock are encountered. Installation is quick and easy and no special tube preparation is required.