This is a lever style louver or jalousie operator used on International series 400 windows. It is left-handed and is of aluminum construction, with a grooved stud that attaches to the moving arm on the jalousie or louver frame. Mounting holes are 1 inch on center.
This louver window operator is constructed from aluminum. It mounts to the left side of your window and features a grooved stud that attaches to the moving arm. This style operator is used by International windows.