It is an optional feature on our website that allows you to create "wishlists" for whatever automotive or other project, and save a list of the parts you need.    For example, if you want to keep a list of all the vacuum line sizes you need for your Subaru, create a list with that name.  You can create additional lists like "Dad's Diesel" and mainatin a list of all the couplers and clamps you need for that project.