The Similars tab of the popstock displays all the types of equipment that are in the same category as the selected type on the Main tab of the popstock window. This information is provided in the event that a selected type is not available, and therefore a user may select a different type of equipment similar to the requested type. Once an alternate type is selected on the similars tab, double click the type or press the 
OK checkmark, and the new type will be added to your equipment list.
