This Eaton Weatherhead 60X6 brass compression sleeve is for use with a same-size sleeve nut (not included) to connect 3/8" outside diameter (OD) tubing to a compression-type fitting and is suitable for use with hydraulic and pneumatic systems. It is made of CA360 brass for corrosion resistance, ductility at high temperatures, and low magnetic permeability. This sleeve is part of a tube compression fitting, can be used with copper, brass, aluminum, or plastic tubing, and does not require a flaring tool for assembly. It has a working pressure of up to 2,000 pounds per square inch (psi) and an operating temperature range of -65 to +250 degrees F (-53 to +121 degrees C). This compression sleeve fitting is suitable for use with hydraulic and pneumatic systems such as refrigeration lines and power steering lines.Tube fittings are components used for connecting, branching, terminating, and changing the direction of tubing in pneumatic and hydraulic systems. They are made of brass, stainless steel, polybutylene terephthalate (PBT), and other materials that resist corrosion and wear. Tube fittings have various types of connections, including threaded, welded, barbed, and push-to-connect (also called one-touch). Push-to-connect connections do not require tools or sealants. Tube fittings are used in various applications, including machine tools, airplane and truck controls, and automated production lines, among others.Eaton manufactures electrical, hydraulic, and mechanical power equipment. The company, founded in 1911, is headquartered in Dublin, Ireland.