500 Series, 12541 Adjustable 1-4, Aluminum Finish, Commercial Grade 3, Standard Duty Door Closer, Fits Interior Doors 3' & Exterior Doors 2' 6", Regular Parallel Arm Or Top Jamb Mount, Non-Handed, Door Opening Up To 180 Degrees, Adjustable Sweep & Latch, UL Listed, Retro Fits Traditional Closer 9-1/6" Horizontal & 3/4" Vertical Mounting Holes.