I added a liner to the specification but it is not adding it to the straights and fittings. How can this be done through the specification because the only way I have gotten it to work now is to added the liner to the duct and fittings in the properties of the itm file. But I feel that should not be the way as I have multiple services using those fittings and some services get a liner and some do not. 

Please help as soon as possible would really appreciate it.

Ken