International Door Closers 883 - Size 3 Spring &ndash; Standard w/Back Check (Regular) Arm Assembly - Hydraulic Surface Mount Door Closer -- Finish (AL) Aluminum Size 3 Spring Power w/Back Check - UL Listed - Surface Mount Hydraulic Door Closer Door Closer Length:8 7/8- Mounting Holes:8 13/16- Overall Height4 - (AL) Aluminum Suitable for Exterior Doors up to (36Swing Out) (32Swing In) - Interior Doors up to 42 Commercial Door Closer  Two Adjustment Valves: Adjustable closing speed  Adjustable latching speed Two Installation Options: Surface Mount or Top Jamb - Back Check - 5 year Factory Warranty