bus Norton 7500 Door Closer Tri-packed Non-handed, Adjustable spring sizes 1-6, Grade 1, Cast aluminum (7500-689)

["The Norton 7500 Series Door Closer offers customers the ideal combination of superior performance, strength and quality.","REGULAR ARM: Only pull side application where double lever arm is used, Most common mounting, providing the greatest closing efficiency.","PARALLEL ARM: Provides the most appealing appearance for a surface-mounted door closer with a double lever arm, Very little or no hardware projecting beyond the frame face, when in closed position, in most situations.","TOP JAMB: For efficiency purposes, this application provides the best alternative to the regular arm, Requires a top rail on the door of just 2-1/8\" (54mm), Provides the best control for doors in exterior walls that swing out of a building","Certified and Tested. 25-year limited warranty."]