Vari-Pitch Adjustable Vents, Lomanco makes it fit - whatever the pitch.
Years ago, with the ingenious invention of the adjustable gable louver, Lomanco was born. All Lomanco Vari-Pitch Adjustable Louvers are constructed entirely of heavy gauge aluminum. Units are completely assembled, ready to install. To determine the size needed, just measure down along the roofline from the peak of the roof to the frame. The appropriate size louver will adjust to the opening in seconds, and can be installed securely in minutes.