Specifies the insulation specification for the object. The software displays this property only when the Insulation Type is Specification Driven.
Rule Driven
Specifies that a rule drives the value. This is the default option. Click to switch
to User Driven 
.
User Driven
Allows you to select a value. Click to switch to Rule Driven .
The User Driven option is not active if it is not present on the parent pipe run.