The ridge cap is used to seal the point at which two upward slopes meet. This can be both along the ridge of the roof as well as a covering for a hip. Either wood grip or self-drilling cap TEK screws can be used, and are applied through the ribs of the metal.
Vented closures are the same length as the panels, and forms a water retardant, insect resistant barrier that allows hot air to escape from the attic, and is better than many of the other more elaborate and expensive venting systems.