How do I differentiate between several listboxes on the same form?

Set request_type_lb = Sheets("RoadmapQuery").ListBoxes(1)
Set threshold_lb = Sheets("RoadmapQuery").ListBoxes(1)

Request type may have 12 items in the listbox. Threshold may have 6 entries.
How can I reference the .listcount (and other elements of the listbox) for each listbox separately?