The GKNL4F 13ft Dual-Face Leveling Staff features three sections with Code/mm graduations, equipped with handles, a circular bubble vial, and a transport bag. Selecting between the Professional 5000 and 3000 series depends on the specific application and precision requirements.

The 5000 series Invar staffs offer exceptionally low thermal expansion for superior accuracy, while the 3000 series, constructed from fiberglass or aluminum, provides reliable performance for standard surveying tasks.