JLG Parts Tilt Angle Gauge. For use on various JLG, Skytrak, Gradall, and Lull telehandler machines. LEV-O-GAGE is level bubble gauge mounted on machine to show frame angle of machine. 3.57" width at widest point by 1.50" height. 10-0-10 degree level gauge. Ensure proper assembly and serial range for parts purchase.