I have the Hel replacement full lines and need an exact measurement on the diameter.  I do not have a tool to get an exact measurement.  If anyone has the replacement hoses ordered with the Heli Horizon bars and can help I would appreciate it tremendously.  These are the full lines that are optional, not the extensions.  Thanks. 

The exact outside dimension is .28 inches or 9/32". I'm not sure what this tells you because this includes the sheath and doesn't really tell you much about the inside diameter.

Rhino,
Thanks for that lightening fast and helpful reply.  That is exactly what I needed.  I really appreciate it.