Features: 1.Fittment:Fit for Ford/Navistar 6.0L & 6.4L Power Stroke 2003-2008, for International Harvester VT365 4200, for Navistar/International 6.0L VT365E. Use with Diesel Compression Tester TU-15. 2.Material:Made from high quality rubber and steel for rust and corrosion resistance. Carefully manufactured to ensure long term use. 3.Function:M14-1.25 thread adapter attached to a hose with quick disconnect screws into the head of the engine in the glow plug hole. 4.Easy to use:M14-1.25 thread adapter attached to a hose with quick disconnect screws into the head of the engine in the glow plug hole. Descriptions: .