International Door Closers 854 - Size 4 Spring - Standard (Regular) Arm Assembly - Hydraulic Surface Mount Door Closer - Finish: (DU) Storefront Bronze Size 4 Spring Power - UL Listed - Surface Mount Hydraulic Door Closer Door Closer Length:9 13/16"-Mounting Holes:3/4"x9 1/16"-Overall Height4 3/4"- (DU) Storefront Bronze Suitable for Exterior Doors up to (42" Swing Out) (36" Swing In) - Interior Doors up to 48" Commercial Door Closer  Two Adjustment Valves: Adjustable closing speed  Adjustable latching speed Two Installation Options: Surface Mount or Top Jamb - 5 year Limited Factory Warranty