Hinge #2, 14 gauge heavy duty. Sits between sections 2 and 3. This offset on a #2 is a step up from the #1 to account for where the door begins to curve into the horizontal track. When your door's making noise or the sections rub at that joint, the hinge might be worn or bent. Pull one off and look for the #2 stamp to confirm what you've got. These 14 gauge hinges are tougher than the thinner 18 gauge ones you sometimes see on builder-grade doors.