H 3670 is an awning operator of aluminum die-cast construction with a gray baked enamel finish used on Pan-American windows. It is right handed with a matching crank handle with a 2-5/8 in link arm. It has an L shaped mounting hole pattern that has 2 top holes that are 5-1/4 in from center of the top holes to the center of the bottom hole and the 2 horizontal holes in the bottom leg are 1-5/16 in apart.